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Optical instruments

Total questions: 151

Worksheet time: 2hrs 47mins

Name
Class
Date
1.

To increase the angular magnification of a simple microscope, one should increase:

a)

the focal length of the lens

b)

the power of the lens

c)

the aperture of the lens

d)

the object size

2.

An optical instrument used for magnification has power 25 D of objective and 20 D of eyepiece. Whether it is a microscope or a telescope?

a)

Microscope

b)

Telescope

3.

The eyepiece of an astronomical telescope has a focal length of 10 cm. The telescope is focused for normal vision of distant objects when the tube length is 1 m. The focal length of the objective is:

a)

20 cm

b)

10 cm

c)

90 cm

d)

100 cm

4.

If the focal length of the objective lens is increased then,

a)

Magnifying power of microscope will increase but that of telescope will decrease

b)

Magnifying power of microscope and telescope both will increase

c)

Magnifying power of microscope and telescope both will decrease

d)

Magnifying power of microscope will decrease but that of telescope will increase

5.

The magnification produced by the objective lens and the eye lens of a compound microscope are 25 and 6 respectively. The magnifying power of this microscope is:

a)

19

b)

31

c)

150

d)

120

6.

The objective of a compound microscope is essentially:

a)

A concave lens of small focal length and small aperture

b)

Convex lens of small focal length and large aperture

c)

Convex lens of large focal length and large aperture

d)

Convex lens of small focal length and small aperture

7.

A compound microscope has two lenses. The magnifying power of one is 5 and the combined magnifying power is 100. The magnifying power of the other lens is:

a)

10

b)

20

c)

50

d)

25

8.

We make the approximation that ...

a)

Light rays from the object are parallel at the telescope

b)

Light rays are coming from at least 1 parsec away

c)

Light rays are not affected by Earth's atmosphere

d)

Light rays will form a perfect image on our screen

9.

For angular magnification we use the equation

a)

=fefo=\frac{f_e}{f_o}  

b)

=fofe=\frac{f_o}{f_e}  

c)

=2αβ=\frac{2\alpha}{\beta}  

d)

=2βα=\frac{2\beta}{\alpha}  

10.

A Cassegrain telescope uses how many mirrors and lenses

a)

2 mirrors and 1 lens

b)

3 mirrors and 1 lens

c)

2 mirrors and 2 lenses

d)

2 mirrors and no lenses

11.

Some of discoveries made by my lenses were: irregularity of the Moon’s surface and the four largest Jupiter’s moons.

Who am I?

a)

Telescope

b)

Microscope

c)

Binoculars

12.

I am a simple manual optical instrument that students use in Science class to be able to observe small things they don't see well such as insects in the garden. Who am I?

a)

Glasses

b)

Camera

c)

Magnifying glass

13.

Without my lenses, scientists would never be able to find out about the Sun and the Solar system.

Who am I?

a)

Camera

b)

Magnifyng glass

c)

Telescope

14.

I have lenses that help children to see better. Who am I?

a)

Camera

b)

Magnifyng glass

c)

Glasses

15.

My lenses help to correct some vision problems like myopia, the astigmatism and hyperopia.

Who am I?

a)

Binoculars

b)

Glasses

c)

Telescope

16.

My lenses help to correct some vision problems that cause headaches, blurred vision and discomfort due to visual effort.

Who am I?

a)

Glasses

b)

Camera

c)

Microscope

17.

My lenses protect the eyes by reducing the range of artificial light that is harmful for vision.

Who am I?

a)

Magnifyng glass

b)

Glasses

c)

Microscope

18.

I have a set of lenses that allows scientists to study and observe the Universe and the Galaxy where we live.

Who am I?

a)

Telescope

b)

Binoculars

c)

Microscope

19.

My lenses allow us to know the world of microorganisms and many disease-causing agents.

Who am I?

a)

Microscope

b)

Camera

c)

Telescope

20.

I have lenses that help people to read newspapers, magazines and see well.

Who am I?

a)

Telescope

b)

Glasses

c)

Camera

21.

Through my lenses, it is possible to record important moments in people's lives.

Who am I?

a)

Magniyng glass

b)

Binoculars

c)

Camera

22.

I am the instrument used by detectives to see the clues better and to solve the mystery.

Who am I?

a)

Telescope

b)

Microscope

c)

Magnifying glass

23.

Through my lenses, people can register and record cultural events.

Who am I?

a)

Binoculars

b)

Telescope

c)

Camera

24.

Some people like using me to enjoy a Safari in Africa, because they can see details of the animals at long distances.

Who am I?

a)

Camera

b)

Binoculars

c)

Glasses

25.

Some people use my lenses to work recording other people, landscapes and objects.

Who am I?

a)

Camera

b)

Binoculars

c)

Glasses

26.

Through my lenses, scientists were able to observe microorganisms and could develop the antibiotics that fight many diseases. Who am I?

a)

Binoculars

b)

Microscope

c)

Telescope

27.

Through my lenses, it is possible to see the colors and the beak’s size of some birds in the forest.

Who am I?

a)

Camera

b)

Binoculars

c)

Glasses

28.

The angular magnification of a system is less than one. Does it mean that the image formed is inverted?

a)

Yes

b)

No

29.

To increase the angular magnification of a simple microscope, one should increase:

a)

the focal length of the lens

b)

the power of the lens

c)

the aperture of the lens

d)

the object size

30.

An optical instrument used for magnification has power 25 D of objective and 20 D of eyepiece. Whether it is a microscope or a telescope?

a)

Microscope

b)

Telescope

31.

The eyepiece of an astronomical telescope has a focal length of 10 cm. The telescope is focused for normal vision of distant objects when the tube length is 1 m. The focal length of the objective is:

a)

20 cm

b)

10 cm

c)

90 cm

d)

100 cm

32.

The magnifying power of an astronomical telescope is 8 and the distance between the two lenses is 54 cm. The focal length of eye lens and objective lens will be respectively:

a)

6 cm and 48 cm

b)

48 cm and 6 cm

c)

8 cm and 64 cm

d)

64 cm and 8 cm

33.

Finger prints are observed by the use of :

a)

Telescope

b)

Microscope

c)

Newtonian telescope

d)

Concave lens

34.

If the focal length of the objective lens is increased then,

a)

Magnifying power of microscope will increase but that of telescope will decrease

b)

Magnifying power of microscope and telescope both will increase

c)

Magnifying power of microscope and telescope both will decrease

d)

Magnifying power of microscope will decrease but that of telescope will increase

35.

The magnification produced by the objective lens and the eye lens of a compound microscope are 25 and 6 respectively. The magnifying power of this microscope is:

a)

19

b)

31

c)

150

d)

120

36.

The objective of a compound microscope is essentially:

a)

A concave lens of small focal length and small aperture

b)

Convex lens of small focal length and large aperture

c)

Convex lens of large focal length and large aperture

d)

Convex lens of small focal length and small aperture

37.

A compound microscope has two lenses. The magnifying power of one is 5 and the combined magnifying power is 100. The magnifying power of the other lens is:

a)

10

b)

20

c)

50

d)

25

38.

What type of mirror does a periscope use?

a)

Plane mirror

b)

Diverging mirror

c)

Convex mirror

d)

Concave mirror

39.

What is the main purpose of a dental mirror?

a)

To illuminate surfaces

b)

To create patterns

c)

To check for cavities

d)

To reflect light

40.

What type of mirror is used in headlights and flashlights?

a)

Diverging mirror

b)

Concave mirror

c)

Convex mirror

d)

Plane mirror

41.

What do side mirrors in vehicles do?

a)

Make objects appear smaller

b)

Make objects appear farther

c)

Make objects appear larger

d)

Make objects appear closer

42.

What is the main function of a microscope?

a)

To illuminate surfaces

b)

To capture images

c)

To magnify small objects

d)

To reflect light

43.

What is the primary purpose of a camera?

a)

To magnify objects

b)

To capture and record images

c)

To view distant objects

d)

To reflect light

44.

What is the main function of a telescope?

a)

To illuminate surfaces

b)

To capture images

c)

To view distant objects

d)

To magnify small objects

45.

What is the purpose of binoculars?

a)

To magnify small objects

b)

To capture images

c)

To illuminate surfaces

d)

To view distant objects

46.

What type of lens does a magnifying glass consist of?

a)

Diverging lens

b)

Plane lens

c)

Convex lens

d)

Concave lens

47.

What do eyeglasses and contact lenses work to correct?

a)

Peripheral vision

b)

Problems with vision

c)

Depth perception

d)

Color vision

48.

What is the main function of a kaleidoscope?

a)

To capture images

b)

To reflect light

c)

To create patterns

d)

To magnify small objects

49.

What type of mirror does a dental mirror use?

a)

Diverging mirror

b)

Plane mirror

c)

Convex mirror

d)

Concave mirror

50.

What is the main function of a periscope?

a)

To capture images

b)

To view distant objects

c)

To magnify small objects

d)

To reflect light

51.

What is the main purpose of a solar cooker?

a)

To capture images

b)

To reflect light

c)

To cook food

d)

To magnify small objects

52.

What type of lens is used in a microscope?

a)

Concave lens

b)

Convex lens

c)

Plane lens

d)

Diverging lens

53.

The eyepiece of an astronomical telescope has a focal length of 10 cm. The telescope is focused for normal vision of distant objects when the tube length is 1 m. The focal length of the objective is:

a)

20 cm

b)

10 cm

c)

90 cm

d)

100 cm

54.

Finger prints are observed by the use of :

a)

Telescope

b)

Microscope

c)

Newtonian telescope

d)

Concave lens

55.

The magnification produced by the objective lens and the eye lens of a compound microscope are 25 and 6 respectively. The magnifying power of this microscope is:

a)

19

b)

31

c)

150

d)

120

56.

A compound microscope has two lenses. The magnifying power of one is 5 and the combined magnifying power is 100. The magnifying power of the other lens is:

a)

10

b)

20

c)

50

d)

25

57.

Some of discoveries made by my lenses were: irregularity of the Moon’s surface and the four largest Jupiter’s moons.

Who am I?

a)

Telescope

b)

Microscope

c)

Binoculars

58.

I am a simple manual optical instrument that students use in Science class to be able to observe small things they don't see well such as insects in the garden. Who am I?

a)

Glasses

b)

Camera

c)

Magnifying glass

59.

Without my lenses, scientists would never be able to find out about the Sun and the Solar system.

Who am I?

a)

Camera

b)

Magnifyng glass

c)

Telescope

60.

I have lenses that help children to see better. Who am I?

a)

Camera

b)

Magnifyng glass

c)

Glasses

61.

My lenses help to correct some vision problems like myopia, the astigmatism and hyperopia.

Who am I?

a)

Binoculars

b)

Glasses

c)

Telescope

62.

Some people like using me to enjoy a Safari in Africa, because they can see details of the animals at long distances.

Who am I?

a)

Camera

b)

Binoculars

c)

Glasses

63.

What type of lens is used to make a magnifying glass?

a)

Convex

b)

Concave

c)

Mirror

d)

Prism

64.

What type of lens is used in a microscope and a telescope?

a)

Concave

b)

Convex

c)

One concave and one convex

d)

Two convex lenses

65.

What is the main goal of an LCD projector?

a)

display images onto screens or walls

b)

control the way energized atoms release photons.

c)

make very distant objects visible

d)

make a chemical record of the pattern of light onto film.

66.
What is the total magnification of a microscope with two lenses when one lens has a magnification of 10x, and the other lens has a magnification of 30x?
a)
15x
b)
30x
c)
40x
d)
300x
67.
A microscope is an instrument that.
a)
makes faraway objects look closer.
b)
makes small objects appear larger.
c)
decreases the size of small objects.
d)
increases the size of small objects.
68.

The lens used in camera is _______ and the image formed is ________, _______ and smaller than the object

a)

convex - real - inverted

b)

convex - virtual - erect

c)

concave - virtual - erect

d)

concave - real - inverted

69.

Which of the following can form an enlarged image?

a)

Convex mirror

b)

Plane mirror

c)

Convex lens

d)

Concave lens

70.

An eye defect which can be corrected using a concave lens is the

a)

Retina

b)

Farsightedness

c)

Optic nerve

d)

Nearsightedness

71.
Which parts of your eye are transparent?
a)
retina
b)
optic nerve
c)
cornea and lens
d)
iris
72.
In dim light, your pupil will be 
a)
larger
b)
smaller
73.
What is letter C
a)
Vitreous humor
b)
Lens
c)
Optic nerve
d)
Cornea
74.

What is a cataract?

a)

Shortening of the eyeball

b)

Cornea has too little curvature

c)

Double vision

d)

Clouding of the lens

75.

Following controls and regulates the amount of light entering the eye

a)

Iris

b)

Pupil

c)

Retina

d)

Corena

76.

What is the near point of a normal human eye?

a)

25 cm

b)

Infinity

c)

-25 cm

77.

How can hypermetropia be corrected?

a)

By using concave lens

b)

By using convex lens

c)

By using bifocal lens

78.

How can near sightedness be corrected?

a)

Using concave lens

b)

Using convex lens

c)

Using bifocal lens

79.

What is myopia?

a)

Near Sightedness

b)

Far sightedness

80.

Q. This part of the eye carries the message from your eye to the part of your brain that controls vision. 

a)

Cornea

b)

Optic Nerve

c)

Retina

d)

Pupil

81.

Q. The vitreous humor is a liquid inside of your eye.  When light passes from the lens into the vitreous, the light changes medium.  What happens to light because of this medium change? 

a)

Light is transmitted.

b)

Light is reflected.

c)

Light is refracted.

d)

Light is absorbed. 

82.

Q. Where is rods and cones are located in our eyes?

a)

Retina

b)

Nervous

c)

Cornea

d)

Optic nerve

83.
Name this technology.
a)
projector
b)
CPU
c)
digital camera
d)
monitor
84.

What does a projector use to show the picture on the screen?

a)

Light

b)

Air

c)

Power

85.

What changes the small pictures into bigger pictures to shine on the screen?

a)

A lens

b)

A switch

c)

A bulb

86.

The light bulb in the projector gets very hot.

a)

True

b)

False

87.

If we adjust the lens , what does it do to the picture on the screen?

a)

It will focus the picture

b)

It will make the picture bigger

c)

It will make the picture move faster

88.

What is a projector?

a)

It changes small pictures into bigger pictures onto a screen

b)

It changes big pictures into smaller pictures onto a screen

89.

What is myopia?

a)

Near Sightedness

b)

Far sightedness

90.

How can hypermetropia be corrected?

a)

By using concave lens

b)

By using convex lens

c)

By using bifocal lens

91.

The ability of our eyes to adjust its focal length is called

a)

Aperture

b)

Power of accomodation

c)

Adjustment

92.

Bifocal lens is used to correct this defect.

a)

Myopia

b)

Hypermetropia

c)

Cataract

d)

Presbyopia

93.
In dim light, your pupil will be 
a)
larger
b)
smaller
94.
The point where the rays meet is known as....
a)
Fire
b)
the focal point
c)
refraction
d)
Plane of the lens
95.

What type of lens do you have in your eye?

a)

Concave

b)

Prismatic

c)

Objective

d)

Convex

96.
What part of the eye controls how much light enters the black hole (pupil) in the center of the eye?
a)
optic nerve
b)
pupil
c)
cornea
d)
iris
97.

Which kind of eye defect is this?

a)

short sighted

b)

long sighted

c)

normal sighted

98.

What is myopia?

a)

Near Sightedness

b)

Far sightedness

99.

What is the near point of a normal human eye?

a)

25 cm

b)

Infinity

c)

-25 cm

100.

What is myopia?

a)

Near Sightedness

b)

Far sightedness

101.

How can near sightedness be corrected?

a)

Using concave lens

b)

Using convex lens

c)

Using bifocal lens

102.

How can hypermetropia be corrected?

a)

By using concave lens

b)

By using convex lens

c)

By using bifocal lens

103.

Cause of myopia. (More than one answer)

a)

Large focal length

b)

Small focal length

c)

Low power

d)

High power

104.

Cause of hypermetropia (More than one answer)

a)

Large focal length

b)

Small focal length

c)

Low power

d)

High power

105.

The ability of our eyes to adjust its focal length is called

a)

Aperture

b)

Power of accomodation

c)

Adjustment

106.

The far point of human eye is

a)

25 cm

b)

Infinity

c)

10,00,000 cm

107.

A child is not able to read letters in the book clearly and has to keep the book far away to read it clearly. The child is suffering from

a)

Myopia

b)

Hypermetropia

c)

Presbyopia

108.

A child is not able to read letters in the book clearly and has to keep the book far away to read it clearly. In this defect, the image is formed

a)

In front of retina

b)

On the retina

c)

Behind the retina

109.

This defect is caused due to elongation of eye ball.

a)

Myopia

b)

Hypermetropia

c)

Presbyopia

110.

Bifocal lens is used to correct this defect.

a)

Myopia

b)

Hypermetropia

c)

Cataract

d)

Presbyopia

111.

This problem arises due to foggy or cloudy lens .

a)

presbyopia

b)

myopia

c)

cataract

d)

hypermetropia

112.

An image is formed on

a)

Iris

b)

Pupil

c)

Retina

d)

Cornea

113.

To see an object comfortably and distinctly, we must hold it about _______ cm from our eyes.

a)

10

b)

25

c)

15

d)

infinity

114.

Following is true for Hypermetropia

a)

It can be corrected by using a convex lens

b)

It may arise when focal length of eye lens is too long

c)

it may arise when eyeball has become too small

d)

all of above

115.

Who is famous for inventing the telescope (even though he didn't really invent it)?

a)

Galileo

b)

James Webb

c)

Newton

d)

Hubble

116.

A refracting telescope uses _______ to focus light.

a)

Lenses

b)

Mirrors

c)

Lasers

d)

Water

117.
A ______ telescope uses a mirror to focus light onto a small area.
a)
reflecting
b)
refracting
c)
radio
d)
spectrum
118.
The type of light humans can see is called ___________ light.
a)
electromagnetic
b)
red
c)
white
d)
visible
119.
What type of telescope is this?
a)
Refractor
b)
Reflector
c)
Non-Optical
d)
X- Ray
120.
What type of telescope is this?
a)
Refractor
b)
Reflector
c)
Non-Optical
d)
X- Ray
121.

The main advantage of using orbital observatories like the Hubble Space Telescope is that __________.

a)

they are easier to use than land-based telescopes.

b)

they are cheaper to build than land-based telescopes.

c)

they can look anywhere in the universe at any time.

d)

they avoid the distortion and absorption of electromagnetic waves by the atmosphere.

122.

The angular magnification of a system is less than one. Does it mean that the image formed is inverted?

a)

Yes

b)

No

123.

To increase the angular magnification of a simple microscope, one should increase:

a)

the focal length of the lens

b)

the power of the lens

c)

the aperture of the lens

d)

the object size

124.

An optical instrument used for magnification has power 25 D of objective and 20 D of eyepiece. Whether it is a microscope or a telescope?

a)

Microscope

b)

Telescope

125.

Finger prints are observed by the use of :

a)

Telescope

b)

Microscope

c)

Newtonian telescope

d)

Concave lens

126.

The magnification produced by the objective lens and the eye lens of a compound microscope are 25 and 6 respectively. The magnifying power of this microscope is:

a)

19

b)

31

c)

150

d)

120

127.

The objective of a compound microscope is essentially:

a)

A concave lens of small focal length and small aperture

b)

Convex lens of small focal length and large aperture

c)

Convex lens of large focal length and large aperture

d)

Convex lens of small focal length and small aperture

128.

A compound microscope has two lenses. The magnifying power of one is 5 and the combined magnifying power is 100. The magnifying power of the other lens is:

a)

10

b)

20

c)

50

d)

25

129.
a microscope with two lenses or sets of lenses
a)
Optical Microscope
b)
Electron Microscope
c)
Compound Microscope
d)
Simple Microscope
130.
a lens that is thicker at the edges and thinner in the middle
a)
Convex Lens
b)
Macroscopic Lens
c)
Invisible Lens
d)
Concave Lens
131.
the distance between a lens and its focal point
a)
Focal Length
b)
Microscopic
c)
Electron
d)
Refraction
132.

The formula of total magnification (MT) is the product of

magnification of the eyepiece (ME) and

magnification of the objective lenses (MO) like LPO, MPO, or HPO. Which equation represents the

statement?

a)

MT = ME X MO

b)

MT = ME + MO

c)

MT = ME- MO

d)

MT = ME/MO

133.
Focus light through lenses to make an image
a)
Magnifying glass
b)
Compound Microscope
c)
Electron Microscope
134.
Uses 2 lenses to magnify the image
a)
Magnifying glass
b)
Compound Microscope
c)
Electron Microscope
135.
These types of microscopes use light to see objects
a)
Magnifying glass
b)
Compound Microscope
c)
Electron Microscope
136.
Magnification =
a)
Image size/Actual size
b)
Makes Images smaller
c)
Makes images bigger
137.
Means smaller images made bigger
a)
Magnification
b)
Resolution
138.
If this is higher, you can see more detail in the image
a)
Magnification
b)
Resolution
139.
Uses beams of electrons to make an image
a)
Magnifying glass
b)
Compound Microscope
c)
Electron Microscope
140.
All microscopes are easy to use
a)
true
b)
false
141.
Compound microscopes can see better resolution compared to electron microscope
a)
true
b)
false
142.
Compound microscopes have the best magnification
a)
true
b)
false
143.

What is the purpose of this button?

a)

ON/OFF

b)

YES/NO

c)

OPEN/CLOSE

d)

LIKE/UNLIKE

144.

True/False: A remote control used to operate another device from a distance.

a)

True

b)

False

145.

Which button was used to input the display cable each time the presentation started?

a)

ENTER

b)

SOURCE

c)

LENS

d)

MANU

146.

Cables are used to connect PCs to projectors.

a)

VGA

b)

DVI

c)

Display port cable

d)

HDMI

147.

_____ used to show on different screens at the same time.

a)

PC screen only

b)

Duplicate

c)

Extend

d)

Second screen only

148.

Choose the correct of meaning about: Print preview

a)

It is a function that lets users see the pages before to print,

b)

It is a function that lets users to print the letter in both side.

149.

What happens when you use this function?

a)

Print double sided

b)

Print preview

c)

Printing Test Pages

d)

Page Setup

150.

Pick the 3 correct answers: What do you do before printing?

a)

Print preview

b)

Printing Test Pages

c)

Page Setup

d)

Print Only one side

151.

True or false: Page Setup is used to set up the printer's tools.

a)

True

b)

False

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