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Question (11)

QN00461

An object is moved closer to the screen while the torch remains fixed. The shadow generally becomes

(A) larger
(B) brighter
(C) smaller
(D) coloured

Correct Answer: C

Explanation:

Moving the object near the screen reduces the shadow size.

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Question (12)

QN00462

Which of the following is essential for shadow formation?

(A) Only a light source
(B) Only a screen
(C) Only a transparent object
(D) A light source, opaque object, and screen

Correct Answer: D

Explanation:

All three are necessary for observing a shadow.

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Question (13)

QN00463

A translucent object forms a shadow that is

(A) completely absent
(B) darker than an opaque object
(C) lighter than an opaque object
(D) always coloured

Correct Answer: C

Explanation:

Some light passes through translucent objects, so the shadow is lighter.

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Question (14)

QN00464

A student changes the colour of an opaque object from green to yellow. What happens to the shadow?

(A) It becomes yellow
(B) It becomes green
(C) Its colour does not change
(D) It disappears

Correct Answer: C

Explanation:

The colour of a shadow remains unchanged.

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Question (15)

QN00465

A polished steel plate redirects sunlight onto a wall. This phenomenon is called

(A) absorption
(B) reflection
(C) transmission
(D) dispersion

Correct Answer: B

Explanation:

Reflection changes the direction of light.

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Question (16)

QN00466

The change in direction of light by a mirror is called

(A) shadow formation
(B) refraction
(C) reflection
(D) scattering

Correct Answer: C

Explanation:

Reflection occurs when light bounces from a mirror.

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Question (17)

QN00467

In an activity using a comb and torch, a thin beam of light changes direction after striking a mirror. This shows that

(A) mirrors absorb light
(B) mirrors produce light
(C) mirrors reflect light
(D) mirrors block light completely

Correct Answer: C

Explanation:

Mirrors reflect the incoming beam of light.

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Question (18)

QN00468

The image formed by a plane mirror is always

(A) upside down
(B) smaller than the object
(C) erect
(D) obtained on a screen

Correct Answer: C

Explanation:

Plane mirrors form upright or erect images.

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Question (19)

QN00469

A pen placed 20 cm in front of a plane mirror appears to be at a distance of

(A) 10 cm behind the mirror
(B) 20 cm behind the mirror
(C) 40 cm behind the mirror
(D) 60 cm behind the mirror

Correct Answer: B

Explanation:

Image distance equals object distance in a plane mirror.

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Question (20)

QN00470

If a child moves 2 m away from a plane mirror, the image appears to move

(A) 1 m away from the mirror
(B) 2 m away from the mirror
(C) 4 m away from the mirror
(D) towards the mirror

Correct Answer: B

Explanation:

The image shifts by the same distance as the object.

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Question (11)

An object is moved closer to the screen while the torch remains fixed. The shadow generally becomes

Explanation:

Link:

Question (12)

Which of the following is essential for shadow formation?

Explanation:

Link:

Question (13)

A translucent object forms a shadow that is

Explanation:

Link:

Question (14)

A student changes the colour of an opaque object from green to yellow. What happens to the shadow?

Explanation:

Link:

Question (15)

A polished steel plate redirects sunlight onto a wall. This phenomenon is called

Explanation:

Link:

Question (16)

The change in direction of light by a mirror is called

Explanation:

Link:

Question (17)

In an activity using a comb and torch, a thin beam of light changes direction after striking a mirror. This shows that

Explanation:

Link:

Question (18)

The image formed by a plane mirror is always

Explanation:

Link:

Question (19)

A pen placed 20 cm in front of a plane mirror appears to be at a distance of

Explanation:

Link:

Question (20)

If a child moves 2 m away from a plane mirror, the image appears to move

Explanation:

Link:

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