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Billings Quarter 4 Practice Test

Total questions: 176

Worksheet time: 4hrs 40mins

Name
Class
Date
1.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
2.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
3.

Which of the following is the best example of work being done.

a)

doing homework

b)

lifting a box

c)

pushing a stationary box

d)

holding a box

4.
In which of these cases is work being done? 
a)
A student sleeps
b)
A student pushes a locked door that does not move
c)
a student carries his chair into another room
d)
A student sits on the carpet
5.
True or false: when the distance an object moves is zero the work done on the object is also zero.  
a)
True
b)
False
6.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
7.

You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?

a)

Yes, work was done

b)

No, work wasn't done

8.

What would 54N be an example of?

a)

work

b)

power

c)

distance

d)

force

9.

what would 1m be an example of?

a)

work

b)

power

c)

time

d)

distance

10.

what would 14J be an example of?

a)

work

b)

distance

c)

time

d)

force

11.

What is an example of a force?

a)

Energy

b)

Power

c)

Pressure

d)

Weight

12.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
13.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

14.

What would you solve for if given time and work?

a)

power

b)

force

c)

distance

d)

work

15.

what would you solve for if given distance and force?

a)

work

b)

power

c)

time

d)

motion

16.

What would you solve for if you were given work and distance

a)

power

b)

time

c)

force

d)

motion

17.

If you have the same work as someone, but in less time

a)

You are more powerful

b)

You are less powerful

c)

You have the same power

18.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

19.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
20.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
21.
Which of the following does a simple machine do?
a)
allows the users to apply less force over a longer distance
b)
reduce the amount of force needed to do work
c)
change the direction of the applied force
d)
all of the above
22.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
23.
The device used to raise a flag up a flag pole is an example of a 
a)
wheel and axle 
b)
lever
c)
inclined plane 
d)
pulley 
24.
An inclined plane wrapped around a rod forms this simple machine 
a)
lever
b)
pulley
c)
screw
d)
wedge 
25.
A simple machine that consists a rigid bar that pivot about a fixed point
a)
lever
b)
pulley
c)
wheel and axle
d)
fulcrum 
26.
A seesaw is an example of a  
a)
wedge
b)
lever 
c)
inclined plane 
d)
pulley 
27.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
28.
This device
a)
wedge
b)
lever
c)
incline plane
d)
wheel and axle
29.
The fixed point on the lever is called 
a)
load
b)
resistance
c)
bar
d)
fulcrum
30.
Name this simple machine. 
a)
Pulley
b)
Wheel and Axle
c)
Inclined Plane
d)
Lever
31.
Name this simple machine. 
a)
Wheel and Axle
b)
Lever
c)
Pulley
d)
Wedge
32.
What is effort (input) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
33.
What is resistance (output) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
34.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
35.
The mechanical advantage of this inclined plane is.....
a)
2.4
b)
3.4
c)
4.4
36.
What is the ideal mechanical advantage of an inclined plane which has 4 cm height and 16 cm slope?
a)
1/4
b)
1
c)
16
d)
4
37.
What is the mechanical advantage for the inclined plane?
a)
5
b)
1/5
c)
45
d)
17
38.
The mechanical advantage of this inclined plane is.....
a)
2.4
b)
3.4
c)
4.4
39.
What is the mechanical advantage of the  LAST inclined plane in the picture?
a)
1
b)
2
c)
3
d)
4
40.
What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the 1machine?
a)
0.25 J
b)
26%
c)
386%
d)
3.86 J
41.
What is the efficiency of the machine if the input is 263 J and the output is 142 J? 
a)
6.26%
b)
54%
c)
100%
d)
260%
42.
A machine has a work output of 8 joules and requires 10 joules of work input to operate. What is the machine's efficiency?
a)
8 J
b)
10 J
c)
80%
d)
800%
43.
What is the efficiency of a machine that has work input of 40 joules and work output of 35 joules?
a)
87.50%
b)
1200
c)
1.142
d)
114%
44.
Work output of a large machine in a factory is 89,000 Joules, and its input is 102,000 joules. Work output of a similar machine is 92,000 joules, and its work input is 104,000 joules. Which machine has greater efficiency?
a)
The first machine
b)
The second machine
c)
Not enough information provided
45.
What is the mechanical efficiency of a machine whose work input is 250 J and work output is 30 Joules??
a)
12 % ME
b)
83 % ME 
c)
.12 % ME 
d)
.83% ME 
46.

Which type of waves have vibrations that run perpendicular to the direction the wave travels?

a)

transverse

b)

longitudinal

47.

Which type of waves have vibrations that run parallel to the direction the wave travels?

a)

transverse

b)

longitudinal

48.

Examples of this type of waves include water waves, waves on a string/jump rope, and light waves.

a)

transverse

b)

longitudinal

49.

An example of this type of wave is a sound wave.

a)

transverse

b)

longitudinal

50.

Waves transfer _______.

a)

energy

b)

matter

c)

particles

51.

_______ is the length of a full cycle of a wave, from one crest to the next crest.

a)

Wavelength

b)

Frequency

c)

Amplitude

52.

The _______ is the highest point on a transverse wave.

a)

Crest

b)

Trough

c)

Wavelength

d)

Amplitude

53.

The _______ is the lowest point on a transverse wave.

a)

Wavelength

b)

Amplitude

c)

Trough

d)

Crest

54.

The _______ is the size or height of a wave, measured from the equilibrium to the crest or trough.

a)

Amplitude

b)

Wavelength

c)

Frequency

55.

The _______ of a wave is how many waves pass a given point every second.

a)

Frequency

b)

Wavelength

c)

Amplitude

56.

Frequency is measured in _______.

a)

Hertz (Hz)

b)

Meters per second

c)

Meters

d)

Newtons

57.

Frequency is how many waves pass a point in 1 second. If 100 waves pass a given point in 4 seconds, what is the wave's frequency?

a)

25 Hz

b)

100 Hz

c)

4 Hz

d)

400 Hz

58.

In a longitudinal wave, a ________ is an area where the particles are spread apart.

a)

rarefaction

b)

compression

c)

crest

d)

trough

59.

In a longitudinal wave, a ________ is an area where the particles are close together.

a)

rarefaction

b)

compression

c)

crest

d)

trough

60.

Examples of ________ waves include visible light, xrays, ultraviolet, and radio waves.

a)

transverse

b)

longitudinal

61.

The formula for _________ is λ = v/f.

a)

wavelength

b)

frequency

c)

period

62.

The formula for frequency is ____________.

a)

λ = v/f

b)

f=1/p

c)

p=1/f

d)

f=p/1

63.

The formula for period is __________.

a)

p=1/f

b)

p=f/1

c)

f=1/p

d)

λ = v/f

64.
travels through solids fastest because the molecules are closer together
a)
speed of sound
b)
wavelength
c)
frequency
d)
amplitude
65.
How high or low a sound is; depends on the frequency (greater frequency= higher pitch)
a)
pitch
b)
frequency
c)
sound
d)
medium
66.
When the sound source moves, the frequency changes
ex. police car siren sounding lower pitch after the car passes
a)
pitch
b)
frequency
c)
Doppler Effect
d)
medium
67.
A wave in which the vibration is in the same direction as that in which the wave is traveling; sound waves
a)
longitudinal wave
b)
ocean wave
c)
transverse wave
d)
mechanical wave
68.
A reflected sound wave
a)
frequency
b)
pitch
c)
echo
d)
rarefaction
69.
High Amplitude =__________________
a)
Louder sounds
b)
Quieter Sounds
70.
Low Amplitude = ______________
a)
Quieter Sounds
b)
Louder sounds
71.
Low frequency = _______ Pitch
a)
Low
b)
High
72.
High frequency = _______ Pitch
a)
High
b)
Low
73.
After the train passed, the pitch of the train whistle became lower. This change in sound would be represented by what change in the diagram above? 
a)
The distance represented by C would increase. 
b)
The distance represented by C would decrease. 
c)
The distance represented by D would increase. 
d)
The distance represented by D would decrease. 
74.
If a wave is traveling at 260 m/s and has a wavelength of 0.8 m/s, what is its frequency?
a)
208 Hz
b)
325 Hz
c)
430 Hz
d)
160 Hz
75.

Vibrations that travel through the air or other medium that can be heard when they reach the ear.

a)

Sound

b)

Pitch

c)

Frequency

d)

Sound Wave

76.

Which sound wave shows the sound with the highest pitch?

a)
b)
c)
77.

Which sound wave shows the loudest sound?

a)
b)
c)
78.

If someone is standing to the left of this wave, they would hear a ______ pitch than someone standing to the right of it.

a)

uglier

b)

prettier

c)

higher

d)

lower

79.

Sound Waves Move faster in what temperature

a)

Hot

b)

Cold

c)

Doesn't Matter

d)

Both

80.

Sound with frequencies between 20 Hz and 20 000 Hz are known as:

a)

ultrasonic

b)

infrasonic

c)

audible range

d)

visible range

81.

The speed of sound in air is 340 m/s. The frequency of the sound waves generated by my voice is 720 Hz. Calculate the wavelength of sound of my voice.

a)

380 m

b)

0.472 m

c)

2.11 m

d)

244,800

e)

none of these are correct

82.

The speed of sound depends on these two things:

a)

The type of medium and the temperature of the medium

b)

Speed of the medium and temperature of the medium

c)

Temperature of the medium and sound of the medium

d)

None of the above

83.

Sonar and echolocation use ----- to detect objects under water.

a)

Refraction

b)

Reflection

84.

Which part of the ear is a thin membrane that is made to vibrate by sound waves?

a)

ear drum

b)

cochlea

c)

auditory nerve

d)

ear canal

85.

What type of waves are sound waves?

a)

transverse

b)

longitudinal

86.

In the ear, what amplifies the vibrations from the ear drum?

a)

cochlea

b)

ossicles (tiny bones)

c)

auditory nerve

d)

ear canal

87.

What are the common names of the ossicles (tiny bones) in your ear?

a)

hammer, anvil and stirrup

b)

hammer, nail and screws

c)

iron, stirrup and leather

d)

block, mallet and nail

88.

Where are the tiny hairs found, which detect vibrations and create electrical signals?

a)

ear drum

b)

cochlea

c)

auditory nerve

d)

ossicles

89.

What are the electrical signals that travel along neurones to the brain called?

a)

impulses

b)

signals

c)

messages

d)

nerves

90.

What carries electrical signals from the ear to the brain?

a)

ear canal

b)

cochlea

c)

auditory nerve

d)

olfactory nerve

91.

What is the frequency range of human hearing?

a)

20 - 20 000 Hz

b)

200 - 200 000 Hz

c)

200 - 20 000 Hz

d)

20 - 200 000 Hz

92.

Inside the cochlea, what causes the membrane to detect different frequencies of sound?

a)

The membrane is thicker at one end than the other

b)

There are different number of hairs in different parts of the membrane

c)

The hairs are of different lengths along the membrane

d)

There is more fluid at one end than the other

93.

How can you calculate the speed of a wave? (2 answers)

a)

distance ÷\div time

b)

frequency x wavelength

c)

frequency ÷\div wavelength

d)

wavelength ÷\div frequency

94.
What particles make up light?
a)
Photons
b)
Neutrons
c)
Protons
95.
Light behaves like both a particle and a ______.
a)
Mass
b)
Wave
c)
Current
96.
What is the speed of light in air?
a)
140,000 miles/sec
b)
186,000 miles/sec
c)
60 miles/hour
d)
120 miles/hour
97.
A light year is...
a)
The speed light travels
b)
How long it takes light to get to you from the sun
c)
The distance light can travel in a year
d)
How many years it takes light to be emitted
98.
What color has the shortest wavelength, or the highest frequency?
a)
yellow
b)
blue
c)
red
d)
violet
99.
What does reflection mean?
a)
bending light
b)
bouncing light
100.
What does refraction mean?
a)
bending light
b)
bouncing light
101.
What type of waves does light travel in?
a)
transverse
b)
compression
c)
high and low waves
d)
waves like the ocean
102.
What is this a picture of?
a)
reflection
b)
refraction
103.

Why does light refract?

a)

speeds up

b)

gets hot

c)

slows down

d)

gains energy

104.

Light travels through an object during

a)

absorption

b)

reflection

c)

transmission

d)

diffraction

105.
The full spectrum of light energy is called the__________
a)
broad spectrum
b)
electromagnetic spectrum
c)
helium spectrum 
d)
natural light spectrum
106.
Electric and magnetic fields produce
a)
electricity
b)
magnets
c)
longitudinal waves
d)
light
107.

What is the earth's primary source of light energy?

a)

moon

b)

sun

c)

waves

d)

fire

108.

The height of the sound waves

a)

Frequency

b)

Amplitude

c)

Wavelength

109.
4 is 
a)
radio
b)
UV 
c)
Visible Light
d)
X-ray
110.
EM waves have the same speed but different:
a)
frequency & medium 
b)
wavelength & frequency
c)
medium & wavelength
d)
color & medium
111.
When the surface of a mirror curves inward, like the inside of a bowl, it is called a
a)
Plane Mirror
b)
Convex Mirror
c)
Concave Mirror
d)
Diffuse Mirror
112.
Which wavelength of visible light has the lowest energy?
a)
Red
b)
Yellow
c)
Orange
d)
Blue
113.
Which of the following types of radiation has the shortest wavelength and the highest frequency?
a)
Radio Waves
b)
Infrared
c)
Visible
d)
X-Rays
114.

What does the picture below illustrate?

a)

Visible Light Spectrum

b)

Electromagnetic Spectrum

c)

Frequency Indicator

d)

Color Line

115.

What is the saying that can help you remember the order of the visible spectrum?

a)

ROYGBIV

b)

RYOBIVG

c)

ROYBVIG

d)

RIBYOVG

116.

How are we able to see the color white?

a)

All colors except red are absorbed

b)

All colors are absorbed

c)

All colors are reflected

d)

All colors except red are reflected

117.

What does reflection mean?

a)

Bending Light

b)

Bouncing Light

118.

Of the visible spectrum, what color has the longest wavelength?

a)

Blue

b)

Green

c)

Yellow

d)

Red

e)

Violet

119.

What type of wave does a light wave resemble?

a)

Transverse wave

b)

Compressional wave

120.

Light is a type of energy that travels as an ______________ ____________.

a)

Longitudinal Wave

b)

Electric Current

c)

Electromagnetic Wave

d)

Magnetic Wave

121.

A prism can be used to...

a)

separate visible light into colors

b)

make a beam of light brighter

c)

measure the speed of light

d)

make UV light visible

122.

What happens when light transitions into a new medium?

a)

Reflection

b)

Absorbing

c)

Refraction

d)

Mirror

123.

A blue dish appears blue because it

a)

absorbs blue light

b)

absorbs white light

c)

reflects white light

d)

reflects blue light

124.

What is this a picture of?

a)

Reflection

b)

Refraction

125.

___________ is a form of energy that we can see with our eyes.

a)

Radio Waves

b)

Visible Light

c)

Ultraviolet

d)

Reflection

126.

What is visible light used in?

a)

Light Bulbs, TVs, Lasers

b)

Nothing, Visible light cannot be used

c)

Sound

d)

When we Breathe

127.

Is Visible Light Dangerous?

a)

No, Visible light cannot harm you

b)

Yes, visible light is highly radioactive and should be handled carefully. Visible light when in contact with human skin can cause aerial skin cancer.

c)

No, this is because visible light isn't real

d)

Yes, Visible light at high concentrations can cause burns, blindness, and indirect DNA damage but at low levels is harmless

128.

What is the Corona? (BONUS)

a)

The temperature of the sun

b)

The outer most layer of the Sun's atmosphere

c)

Another name for the Electromagnetic Spectrum

d)

The measurement of the crests and troughs on a transverse wave

129.
True or false: as you move along the spectrum, radio to gamma waves, the wavelengths decrease in size (get smaller)
a)
true
b)
false
130.
A wave with a large wavelength will have a ______ frequency and _____ energy
a)
high, low
b)
high, high
c)
low, high
d)
low, low
131.
Select the correct order of waves on the EMS from the longest wavelength to the shortest wavelength
a)
Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
b)
Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
c)
Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
d)
Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma
132.
Which has the LONGEST wavelength and, therefore, the lowest frequency/energy
a)
Gamma Rays
b)
Radio Waves
c)
Visible Light
d)
Infrared rays
133.
Which has the SHORTEST wavelength and, therefore, the highest frequency/most energy
a)
Radio waves
b)
Ultraviolet Rays
c)
Gamma Rays
d)
X-rays
134.
Which section of the spectrum is the ONLY one we can see?
a)
X-rays
b)
Visible Light
c)
Gamma Rays
d)
Ultraviolet Rays
135.
How are electromagnetic waves different from other waves? 
a)
They have very short wavelengths 
b)
They transmit energy instead of matter 
c)
They can travel through empty space
d)
They can change direction by reflection 
136.
Which of the following electromagnetic waves has the lowest energy?
a)
gamma ray
b)
infrared wave
c)
visible light wave
d)
microwave
137.
As the frequency of an electromagnetic wave increases, the amount of energy in that wave...
a)
increases.
b)
decreases.
c)
stays the same.
138.
High frequency waves have _________ wavelengths.
a)
varying
b)
long
c)
the same
d)
short
139.
The distance between two crests or two troughs of a wave is called:
a)
frequency
b)
amplitud
c)
wavelength
d)
hertz
140.
How much of the electromagnetic spectrum is visible?
a)
All of it
b)
None of it
c)
Most of it
d)
Only a small part
141.
The height of the wave from the rest position is known as the _____________.
a)
amplitude
b)
crest
c)
trough
d)
wavelength
142.
What are electromagnetic waves?
a)
sound waves
b)
electric & magnetic fields (energy) that travel through empty space very quickly
c)
Someone's name
d)
things like longitudinal waves
143.
Select the correct order of waves on the EMS 
a)
Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
b)
Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
c)
Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
d)
Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma
144.
What is a photon?
a)
When radiation burst through electric waves
b)
The emission of electrons from a metal caused by light striking the metal
c)
The rate at which a waves energy flows through a given unit of area.
d)
packets of electromagnetic energy
145.
Light behaves like both a particle and a ______.
a)
Mass
b)
Wave
c)
Current
146.
What happens to the energy of a photon as the frequency of the wave increases? 
a)
The energy increases
b)
The energy decreases
c)
The energy stays the same 
147.
What is the number of waves that pass a point in one second?
a)
Amplitude
b)
Frequency
c)
Period
d)
Wavelength
148.
Which of the following has wavelengths longer than microwaves?
a)
Infrared waves
b)
Radio waves
c)
Visible light
149.
Which parts of your eye are transparent?
a)
retina
b)
optic nerve
c)
cornea and lens
d)
iris
150.
The part of your eye that gives it its color.  It is a muscle that controls the size of your pupil.
a)
cornea
b)
lens
c)
pupi
d)
iris
151.
The back of the eye;  an upside-down image of whatever you are looking at is projected here. 
a)
lens
b)
cornea
c)
pupi
d)
retina
152.
The first part of the eye that light hits. 
a)
lens
b)
cornea
c)
pupil
d)
retina
153.
What is letter C
a)
Vitreous humor
b)
Lens
c)
Optic nerve
d)
Cornea
154.
What is the cornea?
a)
clear structure that bends light to focus on the retina
b)
white outer layer of the eyeball
c)
clear layer that forms front of the eye
d)
gel that fills space
155.

Near point of an healthy human eye

a)

25 m

b)

2.5 cm

c)

2.5 m

d)

25 cm

156.

Change in focal length of an eye lens is caused by the action of the

a)

Pupil

b)

Retina

c)

Ciliary muscles

d)

Iris

157.

The human eye can focus objects at different distances by adjusting the focal length of the eye lens . This is due to

a)

Presbyopia

b)

Accommodation

c)

Near-sightedness

d)

Far-sightedness

158.

A person with a myopic eye cannot see objects beyond 1.2 metres distinctly . What should be the type of corrective lens used to restore proper vision

a)

Concave lens

b)

Convex lens

c)

Bifocal lens

d)

Concave mirror

159.

What is the far point of human eye with normal vision

a)

Infinity

b)

25cm

c)

2.5 m

d)

25 m

160.

Name the corrective lens used for hypermetropia

a)

Concave lens

b)

convex lens

c)

Bifocal lens

d)

Diverging lens

161.

Function of the optic nerve is is

a)

Transfer the signals to brain

b)

Image formation

c)

sensation of vision

d)

Controls the light entering the human eye

162.

A person gets out in the sunlight from a dark room. How does his pupil regulates and controls the light entering in the eye?

a)

The size of pupil will decrease and less light will enter the eye

b)

The size of pupil will decrease and more light will enter the eye

c)

The size of pupil will increase and less light will enter the eye

d)

The size of pupil will increase and more light will enter the eye

163.
Which parts of your eye are transparent?
a)
retina
b)
optic nerve
c)
cornea and lens
d)
iris
164.
The part of your eye that gives it its color.  It is a muscle that controls the size of your pupil.
a)
cornea
b)
lens
c)
pupi
d)
iris
165.
The back of the eye;  an upside-down image of whatever you are looking at is projected here. 
a)
lens
b)
cornea
c)
pupi
d)
retina
166.
The first part of the eye that light hits. 
a)
lens
b)
cornea
c)
pupil
d)
retina
167.
What is letter C
a)
Vitreous humor
b)
Lens
c)
Optic nerve
d)
Cornea
168.
What is the cornea?
a)
clear structure that bends light to focus on the retina
b)
white outer layer of the eyeball
c)
clear layer that forms front of the eye
d)
gel that fills space
169.

Near point of an healthy human eye

a)

25 m

b)

2.5 cm

c)

2.5 m

d)

25 cm

170.

Change in focal length of an eye lens is caused by the action of the

a)

Pupil

b)

Retina

c)

Ciliary muscles

d)

Iris

171.

The human eye can focus objects at different distances by adjusting the focal length of the eye lens . This is due to

a)

Presbyopia

b)

Accommodation

c)

Near-sightedness

d)

Far-sightedness

172.

A person with a myopic eye cannot see objects beyond 1.2 metres distinctly . What should be the type of corrective lens used to restore proper vision

a)

Concave lens

b)

Convex lens

c)

Bifocal lens

d)

Concave mirror

173.

What is the far point of human eye with normal vision

a)

Infinity

b)

25cm

c)

2.5 m

d)

25 m

174.

Name the corrective lens used for hypermetropia

a)

Concave lens

b)

convex lens

c)

Bifocal lens

d)

Diverging lens

175.

Function of the optic nerve is is

a)

Transfer the signals to brain

b)

Image formation

c)

sensation of vision

d)

Controls the light entering the human eye

176.

A person gets out in the sunlight from a dark room. How does his pupil regulates and controls the light entering in the eye?

a)

The size of pupil will decrease and less light will enter the eye

b)

The size of pupil will decrease and more light will enter the eye

c)

The size of pupil will increase and less light will enter the eye

d)

The size of pupil will increase and more light will enter the eye