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Science Term 1 Full Revision

Total questions: 88

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

What does the picture below illustrate?

a)

Visible Light Spectrum

b)

Electromagnetic Spectrum

c)

Frequency Indicator

d)

Color Line

2.

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

a)

ROYGBIV

b)

RYOBIVG

c)

ROYBVIG

d)

RIBYOVG

3.

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

4.

What does reflection mean?

a)

Bending Light

b)

Bouncing Light

5.

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

a)

Blue

b)

Green

c)

Yellow

d)

Red

e)

Violet

6.

What type of wave does a light wave resemble?

a)

Transverse wave

b)

Compressional wave

7.

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

a)

Longitudinal Wave

b)

Electric Current

c)

Electromagnetic Wave

d)

Magnetic Wave

8.

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

9.

What happens when light transitions into a new medium?

a)

Reflection

b)

Absorbing

c)

Refraction

d)

Mirror

10.

A blue dish appears blue because it

a)

absorbs blue light

b)

absorbs white light

c)

reflects white light

d)

reflects blue light

11.

What is this a picture of?

a)

Reflection

b)

Refraction

12.

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

a)

Radio Waves

b)

Visible Light

c)

Ultraviolet

d)

Reflection

13.

What is visible light used in?

a)

Light Bulbs, TVs, Lasers

b)

Nothing, Visible light cannot be used

c)

Sound

d)

When we Breathe

14.

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

15.

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

16.

Bouncing of a light ray when it strikes a reflecting surface is called.........

a)

Refraction

b)

Dispersion

c)

Reflection

d)

Diffraction

17.

which of the following is not a property of the image formed by a [lane mirror?

a)

virtual and erect

b)

Object size = image size

c)

object distance = image distance

d)

Real and inverted

18.

Which of the following is a concave mirror?

a)
b)
c)
d)
19.

Four students A, B, C and D performed the experiment to determine the focal length of a concave mirror by obtaining the image of a distant tree on a screen. They measured the distances between the screen and the mirror as shown in the above figure.

The correct way of measuring accurate focal length of the mirror is

a)

A

b)

B

c)

C

d)

D

20.

which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in the figure 10.6?

a)

A

b)

B

c)

C

d)

D

21.

Convex mirror is also called as

a)

converging mirror

b)

diverging mirror

c)

plane mirror

d)

silver mirror

22.

The relation between focal length and radius of curvature is

a)

R = 2f

b)

1/f = 2R

c)

f = R/2

d)

R = 2/f

23.

The point on the spherical mirror at the middle of the surface is called

a)

focus

b)

centre of curvature

c)

pole

d)

radius of curvature

24.

The focal length of a plane mirror is ........

a)

infinite

b)

zero

c)

1m

d)

100m

25.

A convex mirror has a focal length 12 cm. Then its radius of curvature is ........ cm

a)

24

b)

12

c)

6

d)

1.2

26.

When the object is in between the centre of curvature (C) and focus (F) of a concave mirror, then the position of the image is ...........

a)

At focus

b)

At the centre of curvature

c)

at infinity

d)

beyond the centre of curvature

27.

Which of the following characteristic of an image formed for a convex mirror?

a)

Enlarged size

b)

virtual image

c)

Real image

d)

inverted image

28.

Which mirror is shown in the figure?

a)

convex mirror

b)

concave mirror

c)

plane mirror

d)

silver mirror

29.

Mirror formula is defined as ........

a)

A

b)

B

c)

C

d)

D

30.

When the object is at infinity, a point sized image is formed at ................ by the convex mirror

a)

focus behind the mirror

b)

focus in front of the mirror

c)

radius of curvature

d)

principal axis

31.

The image formed by a concave mirror when the object is placed between the pole and the focus is ......

a)

virtual, erect and magnified

b)

virtual, erect and diminished

c)

real, inverted and magnified

d)

real, inverted and diminished

32.

The angle of incidence of a ray of light passing through the centre of curvature of a concave mirror is ........... degree

a)

105

b)

180

c)

90

d)

0

33.

According to laws of reflection,

a)

angle of incidence > angle of reflection

b)

angle of incidence < angle of reflection

c)

angle of incidence = angle of reflection

d)

both 1 and 2

34.

Where will be the images of the Sun or the moon are formed by a concave mirror?

a)

Focus

b)

Pole

c)

centre of curvature

d)

beyond centre of curvature

35.

What is the size of the image formed when an object is kept at the focus in front of concave mirror?

a)

enlarged

b)

diminished

c)

highly enlarged

d)

highly diminished

36.

Which of the the following mirror is used in search lights ?

a)

Plane mirror

b)

Converging mirror

c)

Diverging mirror

d)

Convex mirror

37.

Identify the mirror which forms always a virtual and diminished image .

a)

Concave mirror

b)

Converging mirror

c)

Plane mirror

d)

Convex mirror

38.

Where would an object be placed to get an image at the centre of the curvature of a concave mirror ?

a)

At focus

b)

At infinity

c)

At centre of the curvature

d)

Between F and C

39.

which of the following quantity remain constant during the reflection of light ?

a)

Amplitude

b)

Wavelength

c)

Velocity

d)

Phase

40.

The image formed by the concave mirror, which is focused the tree located at infinite distance is -----'

a)

At C

b)

At F

c)

At 2C

d)

At 2F

41.

In which of the following condition concave mirror forms a virtual image ?

a)

When an object is placed at C

b)

When an object is placed at F

c)

When an object is placed at 2C

d)

When an object is placed in between F and P

42.

The mirror which forms virtual,erect and magnified image is .....

a)

Converging mirror

b)

Convex mirror

c)

Plane mirror

d)

Diverging mirror

43.

Which mirror forms always a virtual image and same size as an object .

a)

Concave

b)

Convex

c)

Plane

d)

Converging

44.

From where to draw the normal line to the point of incident, in case of spherical mirrors.

a)

From C

b)

From F

c)

From infinity

d)

From P

45.

The mirror whose focal length is negative is ?

a)

Concave mirror

b)

Convex mirror

c)

Diverging mirror

d)

Plane mirror

46.

Which of the following mirror has infinite focal length .

a)

Concave mirror

b)

Convex mirror

c)

Converging mirror

d)

Plane mirror

47.

convex mirror is used as a rear view mirror because ......

a)

If forms an erect image

b)

It forms the diminished image

c)

It forms the virtual image

d)

All the above reasons

48.

The mirror which forms the image whose magnification always positive is....

a)

Convex

b)

Concave

c)

Converging

d)

Plane

49.

The magnification is negative for .....

a)

Virtual image

b)

Real image

c)

Erect image

d)

Upright image

50.

------ is a mid point of the pole and the centre of the curvature .

a)

Focus

b)

Centre

c)

Focal length

d)

Radius of creature

51.
a)
Reflection
b)
Refraction
52.
a)
Reflection
b)
Refraction
53.
Light bending as it passes through a rain drop is an example of...
a)
Refraction
b)
Reflection
54.
Refraction is the bending of a wave disturbance as it passes from one _________ into another.
a)
glass
b)
medium
c)
area
d)
boundary
55.
In what medium does light travel the fastest?
a)
vacuum
b)
air
c)
water
d)
glass
56.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
57.
When light passes at an angle to the normal from one material into another material in which its speed is higher 
a)
it is bent toward the normal.
b)
it always lies along the normal.
c)
it is unaffected.
d)
it is bent away from the normal.
58.
When light passes at an angle to the normal from one material into another material in which its speed is lower
a)
it is bent towards the normal.
b)
it always lies along the normal.
c)
it is unaffected.
d)
it is bent away from the normal.
59.
How is light affected by an increase in the index of refraction?
a)
Its frequency increases
b)
Its frequency decreases
c)
Its speed increases
d)
Its speed decreases
60.
Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle?
a)
total internal reflection
b)
total external transmission
c)
partial reflection, partial transmission
d)
partial reflection, total transmission
61.
Atmospheric refraction of light rays is responsible for which of the following effects? 
a)
spherical abberation
b)
mirages
c)
chromatic abberation
d)
total internal reflection in a gemstone
62.
Which color of light is most refracted during dispersion by a prism?
a)
red
b)
yellow
c)
green
d)
violet
63.
What type of image is formed when rays of light actually intersect?
a)
real
b)
virtual
c)
curved
d)
projected
64.
The velocity of light in vacuum is _______ m/s
a)
3x108
b)
3x1012
c)
3x106
d)
3x1010
65.
Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
66.
Light travels through a liquid at 2.25 EE 8 m/s. What is the index of the liquid?
a)
1.33
b)
1.0
c)
1.523
d)
2.45
67.
Glass has a _____________ index of refraction than air.
a)
Equal
b)
Greater
c)
Less
d)
Impossible to say
68.
The formula to calculate the refractive index is
a)
n=cv
b)
n=v/c
c)
n=c/v
d)
v=nc
69.
Swimming pools and the ocean look shallower than they really are due to:
a)
reflection 
b)
dispersion
c)
refraction
d)
total internal reflection
70.
Glass has a _____________ index of refraction than air.
a)
Equal
b)
Greater
c)
Less
d)
Impossible to say
71.
Absolute refractive index of any medium is always _______.
a)
less than 1
b)
greater than 1
c)
1
d)
0
72.
Light has the highest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
73.

A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in figure. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?

a)
b)
c)
d)
74.

The clear sky appears blue because

a)

blue light gets absorbed in the atmosphere

b)

ultraviolet radiations are absorbed in the atmosphere

c)

violet and blue lights get scattered more than lights of all other colours by the atmosphere

d)

light of all other colours is scattered more than the violet and blue colour lights by the atmosphere

75.

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

a)

is scattered the most by smoke or fog

b)

is scattered the least by smoke or fog

c)

is absorbed the most by smoke or fog

d)

moves fastest in air

76.
Which images are opaque?
a)
A & C
b)
A,C,E, & F
c)
D, E, & F
d)
A & E
77.
What is being blocked when a shadow is formed?
a)
Light Source
b)
Light Path
c)
Object
d)
Eye
78.
What is the difference between reflection and refraction? 
a)
Both involve light bending through a medium
b)
Reflection is light bouncing off a medium's surface and refraction is light bending through a medium
c)
Reflection is light bending through a medium's surface and refraction is light bouncing off a medium
d)
Refraction is light being absorbed in a medium and reflection is light being bent through a different medium
79.

This is the example of dispersion of light

a)

sky looks bright orange in the evening

b)

shadow

c)

Pool seems shallower

d)

rainbow

80.

these are examples of phenomenon of scattering of light except

a)

Sky appears blue at midday

b)

Sky appears reddish in the evening

c)

Rainbow after rain

81.

Name the light phenomenon above.

a)

Reflection

b)

Refraction

c)

Dispersion

d)

Scatteting

82.

Which of the following natural phenomenons occur due to light dispersion.

a)
b)
c)
d)
83.

Why is the component of color in a rainbow can be seen when light passes through a glass prism?

a)

phenomena of scattering of light

b)

phenomena of dispersion of light

c)

phenomena of reflection of light

d)

phenomena of diffraction of light

84.

Why is the spectrum of light separated into its components of color when white light is directed to a prism?

a)

Because light reflects off the prism's surface

b)

The incident white light refracts and separates into its constituent colors

c)

The white light is absorbed by the prism, separating its colors

d)

The light speeds up as it moves from air into the denser plastic material

85.

Look at the diagram given. This is the first prism. What happen if A SECOND inverted prism is placed behind the first prism?

a)

the various colors pass through it and form brighter spectrum

b)

the various colors pass through it and form a white light back

c)

the various colors pass through it and form an opposite spectrum colors

d)

nothing will happen

86.

Which of the following is example light scattering ?

( There CAN be more than 1 answer)

a)
b)
c)
d)
87.

What's your Enemy's Name?(shi bolne pr points hai)

4 lines
88.

Why does scattering of light occur?

a)

Light rays are reflected by atmospheric molecules and scatter in all directions

b)

Light rays are blocked and refracted to all directions by the clouds or particles in the air

c)

Light rays are transmitted and refracted in all directions by the clouds or particles in the air

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