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Question (11)

QN00551

Which of the following objects can form a shadow?

(A) Only opaque objects
(B) Only transparent objects
(C) Opaque and translucent objects
(D) Only luminous objects

Correct Answer: C

Explanation:

Both opaque and translucent objects can form shadows.

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Question (12)

QN00552

If there is no light source, shadows cannot form because

(A) objects disappear
(B) light is needed to create contrast
(C) screens stop working
(D) air absorbs all light

Correct Answer: B

Explanation:

Shadows require light to be blocked.

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Question (13)

QN00553

A child observes a tree’s shadow changing direction during the day. This happens due to the

(A) movement of clouds only
(B) movement of the Sun in the sky
(C) colour of the tree
(D) rotation of the tree

Correct Answer: B

Explanation:

The Sun’s apparent movement changes shadow direction.

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Question (14)

QN00554

Which of the following statements correctly defines a shadow?

(A) A bright image formed by reflection
(B) A dark region formed when light is blocked
(C) A coloured patch formed by refraction
(D) A reflection seen in water

Correct Answer: B

Explanation:

Shadows are dark regions formed by blocked light.

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Question (15)

QN00555

A student places a hand between a torch and a white screen. Which condition will produce the sharpest shadow?

(A) Hand close to torch
(B) Hand close to screen
(C) Hand moving continuously
(D) Torch facing away from screen

Correct Answer: B

Explanation:

Shadows are sharper when the object is near the screen.

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Question (16)

QN00556

Transparent objects usually do not form dark shadows because they

(A) emit light
(B) reflect all light
(C) allow most light to pass through
(D) absorb all light

Correct Answer: C

Explanation:

Transparent objects transmit most light.

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Question (17)

QN00557

A large shadow can be formed by a small object when the object is placed

(A) very close to the light source
(B) very close to the screen
(C) behind the screen
(D) far from both source and screen

Correct Answer: A

Explanation:

Closer objects produce larger shadows.

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Question (18)

QN00558

Which screen is most suitable for observing a shadow clearly?

(A) Transparent glass
(B) White wall
(C) Black cloth
(D) Mirror

Correct Answer: B

Explanation:

White surfaces show shadows clearly.

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Question (19)

QN00559

A student changes the colour of a toy from red to green. What happens to the colour of its shadow?

(A) It becomes green
(B) It becomes red
(C) It remains dark
(D) It becomes yellow

Correct Answer: C

Explanation:

Shadows do not show the colour of objects.

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Question (20)

QN00560

The shadow of a moving fan appears blurred because the fan

(A) reflects light strongly
(B) rotates rapidly
(C) absorbs all light
(D) becomes transparent

Correct Answer: B

Explanation:

Rapid movement blurs the shadow.

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Question (11)

Which of the following objects can form a shadow?

Explanation:

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Question (12)

If there is no light source, shadows cannot form because

Explanation:

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Question (13)

A child observes a tree’s shadow changing direction during the day. This happens due to the

Explanation:

Link:

Question (14)

Which of the following statements correctly defines a shadow?

Explanation:

Link:

Question (15)

A student places a hand between a torch and a white screen. Which condition will produce the sharpest shadow?

Explanation:

Link:

Question (16)

Transparent objects usually do not form dark shadows because they

Explanation:

Link:

Question (17)

A large shadow can be formed by a small object when the object is placed

Explanation:

Link:

Question (18)

Which screen is most suitable for observing a shadow clearly?

Explanation:

Link:

Question (19)

A student changes the colour of a toy from red to green. What happens to the colour of its shadow?

Explanation:

Link:

Question (20)

The shadow of a moving fan appears blurred because the fan

Explanation:

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