Light Test

Result

Light Test - 26

Score
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Rank
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TIME Taken - -

SHARING IS CARING

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Weekly Quiz Competition

Question 1
1 / -0

Why is a Converging lens so called ?

A
The rays of light passing through it meet at a point.

B
The rays of light passing through it pass without any deviation.

C
The rays of light passing through it move away from each other.

D
None of these

Solution

The converging lens focused all parallel rays striking on the converging lens at focus.
Question 2
1 / -0

Consider the following statements :
A real image
1. can be formed on a screen.
2. is always magnified and inverted.
Which of the statements given above is/are correct?

A
Only $$1$$

B
Only $$2$$

C
Both $$1$$ and $$2$$

D
Neither $$1$$ nor $$2$$

Solution

If the image is real then the light will actually converge to form it.
Hence, it can be obtained on a screen.
Hence statement $$1$$ is true.
If the object is at infinity for a concave mirror then it forms a diminished and real image of the object. Hence, statement $$2$$ is false.
Question 3
1 / -0

The headlights of a car have reflectors behind the bulb. What is the function of those reflectors?

A
To concentrate the light rays into a beam

B
To show the magical effect of mirrors

C
To dissipate the heat energy generated by the bulb

D
None of these

Solution

A concave mirror is used as a reflector in headlights so that a bulb at its focus will get a focused beam of parallel light rays.
Hence, the correct option is $$(A)$$
Question 4
1 / -0

Choose the alternative which closely resembles the mirror image of the given combination.

A
1

B
2

C
3

D
4

Solution

The mirror image is laterally inverted.

Answer-(D)
Question 5
1 / -0

Choose the correct mirror image for the word SHARE

A
A

B
B

C
C

D
D

Solution

The image formed by a plane mirror is laterally inverted.

Answer-(D)
Question 6
1 / -0

Choose the mirror image of the word above:

A
1

B
2

C
3

D
4

Solution

The image formed by a plane mirror is laterally inverted.

Hence, the correct answer is -(B)
Question 7
1 / -0

Incident light falling on a surface is sent back into the same medium. This phenomenon is known as

A
Dispersion

B
Reflection

C
Refraction

D
Polarization

Solution

Reflection is the phenomenon by which any incident light falling on a surface is sent back into the same medium where it originated.
So correct answer is reflection.
Question 8
1 / -0

A candle can not be seen through a bent pipe. This shows that

A
Light reflects when incident on a surface

B
Light does not reflect when incident on a surface

C
Light does not travel in a straight line

D
Light travels in a straight line

Solution

Since light travels through a straight line, a candle cannot be seen through a bent pipe.

Answer-(D)
Question 9
1 / -0

Convex lens

A
Shrinks the image

B
Magnifies the image

C
Sharpens the image

D
Increase the contrast of the image

Solution

When the object is between the Focal point and the center of curvature then the image is formed beyond the imaginary point and behind the object which is virtual and magnified.
Question 10
1 / -0

Rajesh conducts the following experiment.
He cuts $$3$$ cardboard pieces, each with a hole in the center, and aligns them in a straight line as shown in the image. He now puts a candle in front of the first cardboard piece and looks at it from behind the third piece. He is able to see the candle. He puts the third cardboard piece aside and now tries to look at the candle. But this time, he is not able to see it.

What can be concluded from this experiment?

A
The visibility of the candle depends on the position of the candle with respect to Rajesh

B
The visibility of candle depends on the position of Rajesh

C
The visibility of candle depends on the relative alignment of $$3$$ cardboards

D
The candle is visible only when the $$3$$ cardboards are in a line because light from the candle travels only in a straight line, to reach Rajesh's eyes.

Solution

Light travels in a straight line, called a ray which represents the direction of light propagation until it is not obstructed by some other particles or medium. This phenomenon is called the rectilinear propagation of light.