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Question (11)

QN002441

A student measures an angle of incidence of 63°. What is the total angle between the incident ray and reflected ray?

(A) 63°
(B) 126°
(C) 117°
(D) 27°

Correct Answer: B

Explanation:

Angle between incident and reflected rays = 2 × 63° = 126°.

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Question (12)

QN002442

In Activity 10.4, changing the direction of the incident beam caused the reflected beam to:

(A) Disappear
(B) Remain fixed
(C) Shift its direction
(D) Become brighter

Correct Answer: C

Explanation:

The reflected beam changes direction when the incident beam changes.

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Question (13)

QN002443

Light is represented in ray diagrams by:

(A) Curved arrows
(B) Straight lines with arrows
(C) Dotted circles
(D) Zig-zag lines

Correct Answer: B

Explanation:

Light rays are represented by straight lines with arrows.

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Question (14)

QN002444

The ray that strikes the mirror surface is called the:

(A) Reflected ray
(B) Normal ray
(C) Incident ray
(D) Refracted ray

Correct Answer: C

Explanation:

The incoming ray is called the incident ray.

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Question (15)

QN002445

The ray that returns from the mirror after striking it is called the:

(A) Incident ray
(B) Reflected ray
(C) Normal ray
(D) Convergent ray

Correct Answer: B

Explanation:

The outgoing ray after reflection is called the reflected ray.

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Question (16)

QN002446

A ray strikes a mirror making an angle of 30° with the normal. The reflected ray makes an angle of:

(A) 15°
(B) 30°
(C) 60°
(D) 90°

Correct Answer: B

Explanation:

Angle of reflection equals angle of incidence.

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Question (17)

QN002447

A ray strikes a mirror making an angle of 60° with the normal. The angle between the reflected ray and the normal is:

(A) 30°
(B) 60°
(C) 90°
(D) 120°

Correct Answer: B

Explanation:

The reflected ray also makes 60° with the normal.

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Question (18)

QN002448

If the angle between the incident ray and reflected ray is 100°, the angle of incidence is:

(A) 25°
(B) 50°
(C) 100°
(D) 80°

Correct Answer: B

Explanation:

i = 100° ÷ 2 = 50°.

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Question (19)

QN002449

A reflected ray makes an angle of 70° with the normal. What is the angle between the incident ray and reflected ray?

(A) 70°
(B) 140°
(C) 35°
(D) 110°

Correct Answer: B

Explanation:

Angle between incident and reflected rays = 2 × 70° = 140°.

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Question (20)

QN002450

In Activity 10.5, the reflected beam disappeared when the chart paper was bent because:

(A) The mirror stopped reflecting light
(B) The beam became weak
(C) The reflected ray was no longer in the same plane
(D) The torch stopped working

Correct Answer: C

Explanation:

Bending the chart paper disturbed the common plane required by the second law.

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Question (11)

A student measures an angle of incidence of 63°. What is the total angle between the incident ray and reflected ray?

Explanation:

Link:

Question (12)

In Activity 10.4, changing the direction of the incident beam caused the reflected beam to:

Explanation:

Link:

Question (13)

Light is represented in ray diagrams by:

Explanation:

Link:

Question (14)

The ray that strikes the mirror surface is called the:

Explanation:

Link:

Question (15)

The ray that returns from the mirror after striking it is called the:

Explanation:

Link:

Question (16)

A ray strikes a mirror making an angle of 30° with the normal. The reflected ray makes an angle of:

Explanation:

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Question (17)

A ray strikes a mirror making an angle of 60° with the normal. The angle between the reflected ray and the normal is:

Explanation:

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Question (18)

If the angle between the incident ray and reflected ray is 100°, the angle of incidence is:

Explanation:

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Question (19)

A reflected ray makes an angle of 70° with the normal. What is the angle between the incident ray and reflected ray?

Explanation:

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Question (20)

In Activity 10.5, the reflected beam disappeared when the chart paper was bent because:

Explanation:

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