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Question (11)

QN00521

In a dark room, a torch beam is directed toward a wall. Which object will produce the brightest light spot on the wall?

(A) Thick cardboard
(B) Tracing paper
(C) Clear glass
(D) Wooden block

Correct Answer: C

Explanation:

Clear glass allows maximum light to pass.

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Question (12)

QN00522

Which pair contains only transparent materials?

(A) Clear glass and clean water
(B) Tracing paper and cardboard
(C) Wood and metal sheet
(D) Thick cloth and plastic box

Correct Answer: A

Explanation:

Both clear glass and clean water are transparent.

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Question (13)

QN00523

A student places butter paper in front of a torch. The light spot becomes faint. Butter paper is

(A) transparent
(B) translucent
(C) opaque
(D) luminous

Correct Answer: B

Explanation:

Butter paper allows partial light passage.

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Question (14)

QN00524

Which of the following would completely block sunlight entering a room?

(A) Glass window
(B) Net curtain
(C) Wooden board
(D) Thin plastic sheet

Correct Answer: C

Explanation:

Wooden boards are opaque.

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Question (15)

QN00525

Transparent materials are useful for spectacles because they

(A) block light completely
(B) allow clear passage of light
(C) reflect all light
(D) produce light

Correct Answer: B

Explanation:

Transparent materials help us see clearly.

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Question (16)

QN00526

A student can read a book clearly through a material. The material is most likely

(A) opaque
(B) translucent
(C) transparent
(D) coloured

Correct Answer: C

Explanation:

Transparent materials allow clear visibility.

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Question (17)

QN00527

Which material is most suitable for making a lampshade that gives soft light?

(A) Iron sheet
(B) Thick wood
(C) Frosted glass
(D) Steel plate

Correct Answer: C

Explanation:

Frosted glass diffuses light softly.

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Question (18)

QN00528

A torch is covered with black chart paper. What will happen to the light beam?

(A) It becomes brighter
(B) It passes partially
(C) It does not pass through
(D) It changes direction

Correct Answer: C

Explanation:

Black chart paper blocks light.

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Question (19)

QN00529

Which statement about translucent materials is correct?

(A) They block all light
(B) They allow partial passage of light
(C) They emit light
(D) They reflect all light

Correct Answer: B

Explanation:

Translucent materials allow some light to pass.

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Question (20)

QN00530

A student uses three sheets separately in front of a torch—clear plastic, tracing paper, and cardboard. Which sheet will allow maximum light?

(A) Cardboard
(B) Tracing paper
(C) Clear plastic
(D) All equally

Correct Answer: C

Explanation:

Clear plastic is transparent.

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Question (11)

In a dark room, a torch beam is directed toward a wall. Which object will produce the brightest light spot on the wall?

Explanation:

Link:

Question (12)

Which pair contains only transparent materials?

Explanation:

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Question (13)

A student places butter paper in front of a torch. The light spot becomes faint. Butter paper is

Explanation:

Link:

Question (14)

Which of the following would completely block sunlight entering a room?

Explanation:

Link:

Question (15)

Transparent materials are useful for spectacles because they

Explanation:

Link:

Question (16)

A student can read a book clearly through a material. The material is most likely

Explanation:

Link:

Question (17)

Which material is most suitable for making a lampshade that gives soft light?

Explanation:

Link:

Question (18)

A torch is covered with black chart paper. What will happen to the light beam?

Explanation:

Link:

Question (19)

Which statement about translucent materials is correct?

Explanation:

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Question (20)

A student uses three sheets separately in front of a torch—clear plastic, tracing paper, and cardboard. Which sheet will allow maximum light?

Explanation:

Link:

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