Light Test

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Light Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

Choose the wrong statement related to a virtual image.

A
Virtual images are always produced by plane mirrors

B
Virtual images are always erect

C
Virtual image can be obtained on the screen

D
Both A and B

Solution

Virtual images are formed by plane, concave, and also by convex mirrors. They are always erect. Virtual images cannot be obtained on a screen.
Question 2
1 / -0

Which of the following is not the case with image formed by a plane mirror:

A
It is erect

B
It is virtual

C
It is diminished

D
It is at the same distance as the object

Solution

The image that is formed by a plane mirror has the following characteristics -
1. The image is virtual and non-inverted
2. The image is of the same size as the object
3. The image is at the same distance as the object from the mirror
4. The image is laterally inverted
Therefore, the image formed by a plane mirror cannot be diminished.
Question 3
1 / -0

How many colours comprises white light?

A
infinite

B
seven

C
three

D
fourteen

Solution

White light comprises of seven colours- Violet, Indigo, Blue. Green, Yellow, Orange , Red.
So, when white light consisting of seven colors falls on a transparent medium (glass prism) , each color in it is refracted ( or deviated ) by a different angle , with the result that seven colors are spread out to form a spectrum, The red color is deviated least , so it forms the upper part of the spectrum . On the other hand, violet color is deviated the maximum, so violet appears at the bottom of the spectrum.
Question 4
1 / -0

The term reflection refers to the bending of light rays:

A
when they strike a mirror

B
when they enter a different medium

C
around a sharp edge

D
around the boundary of a narrow aperture

Solution

In the reflection phenomena, Light rays travel through the same medium. Hence, The term reflection refers to the bending of light rays when they strike a mirror.
Question 5
1 / -0

Which of the following forms a virtual and erect image for all positions of the object?

A
Convex lens

B
Plane mirror

C
Convex mirror

D
Concave mirror

Solution

A plane mirror always forms a virtual and erect image for all positions of the object.
Question 6
1 / -0

An ideal mirror :

A
Absorbs all the amount of light incident on it

B
Refracts all the light

C
Reflects all the light

D
None of the above

Solution

An ideal mirror has a reflecting surface so smooth that it reflects back all the light rays striking without any absorbance.
Question 7
1 / -0

A plane mirror gives a real image when the incident beam is:

A
Wide

B
Narrow

C
Convergent

D
Divergent

Solution

A plane mirror can produce a real image if and only if the incident rays are convergent in nature.
Question 8
1 / -0

Reflection is the ........ of light off a surface.

A
Bouncing

B
hitting

C
firing

D
all

Solution

Reflection is the $$bouncing$$ of light off a surface.
Question 9
1 / -0

Convex lens is always :

A
tapering at edges

B
thicker in middle

C
converges rays at a point

D
all of the above

Solution

Answer is D.

A convex lens is a converging lens. When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.
A convex lens is thicker at the centre than at the edges.
Hence, all the options are right.
Question 10
1 / -0

In the case of plane mirror. from the mirror:
distance of the image $$=$$ distance of the ........

A
Second image

B
object

C
both

D
none

Solution

The plane mirror is always for Virtual, erect and same size images and located at the same distance another side of the mirror. ie Object distance and image distance from mirror is always same.
Option B

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Re-Attempt Weekly Quiz Competition

Light Test - 6

Result

Light Test - 6

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SHARING IS CARING

Question 1

Virtual images are always produced by plane mirrors

Virtual images are always erect

Virtual image can be obtained on the screen

Both A and B

Solution

Question 2

It is erect

It is virtual

It is diminished

It is at the same distance as the object

Solution

Question 3

infinite

seven

three

fourteen

Solution

Question 4

when they strike a mirror

when they enter a different medium

around a sharp edge

around the boundary of a narrow aperture

Solution

Question 5

Convex lens

Plane mirror

Convex mirror

Concave mirror

Solution

Question 6

Absorbs all the amount of light incident on it

Refracts all the light

Reflects all the light

None of the above

Solution

Question 7

Wide

Narrow

Convergent

Divergent

Solution

Question 8

Bouncing

hitting

firing

all

Solution

Question 9

tapering at edges

thicker in middle

converges rays at a point

all of the above

Solution

Question 10

Second image

object

both

none

Solution

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