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Question (21)

QN00471

Which property of a plane mirror explains why “AMBULANCE” is written in reverse on the vehicle?

(A) Reflection
(B) Dispersion
(C) Lateral inversion
(D) Refraction

Correct Answer: C

Explanation:

Plane mirrors interchange left and right.

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Question (22)

QN00472

Which pair of English letters appears unchanged even after lateral inversion in a plane mirror?

(A) B and F
(B) T and O
(C) P and Q
(D) L and J

Correct Answer: B

Explanation:

T and O have vertical symmetry.

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Question (23)

QN00473

A student stands 3 m in front of a mirror. What is the distance between the student and the image?

(A) 3 m
(B) 6 m
(C) 1.5 m
(D) 9 m

Correct Answer: B

Explanation:

Distance between object and image = 3 m + 3 m = 6 m.

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Question (24)

QN00474

Which statement about the image formed by a plane mirror is correct?

(A) It can be captured on a screen
(B) It is always upside down
(C) It is of the same size as the object
(D) It is smaller than the object

Correct Answer: C

Explanation:

Plane mirror images are equal in size to the object.

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Question (25)

QN00475

In a pinhole camera, the image formed is

(A) erect and enlarged
(B) inverted and real
(C) coloured and erect
(D) virtual and upright

Correct Answer: B

Explanation:

A pinhole camera forms a real inverted image.

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Question (26)

QN00476

A student observes a tree using a pinhole camera. The top of the tree appears at the

(A) top of the screen
(B) centre of the screen only
(C) bottom of the screen
(D) side of the screen

Correct Answer: C

Explanation:

Images in a pinhole camera are inverted.

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Question (27)

QN00477

Which statement about a pinhole camera is correct?

(A) It uses lenses to magnify objects
(B) It forms images due to reflection from mirrors
(C) It works because light travels in straight lines
(D) It produces erect images only

Correct Answer: C

Explanation:

Straight-line travel of light forms the image.

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Question (28)

QN00478

A periscope made using two plane mirrors helps a person to

(A) produce light
(B) see objects not directly visible
(C) create shadows
(D) enlarge images

Correct Answer: B

Explanation:

Reflection from two mirrors helps see hidden objects.

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Question (29)

QN00479

A kaleidoscope produces many beautiful patterns mainly because of

(A) absorption of light
(B) multiple reflections
(C) shadow formation
(D) bending of light

Correct Answer: B

Explanation:

Repeated reflections create colourful patterns.

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Question (30)

QN00480

The Indian government promotes the use of LED lamps mainly because LEDs

(A) produce coloured shadows
(B) consume less electricity and last longer
(C) are made only in villages
(D) do not reflect light

Correct Answer: B

Explanation:

LEDs save energy and have longer life.

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Question (21)

Which property of a plane mirror explains why “AMBULANCE” is written in reverse on the vehicle?

Explanation:

Link:

Question (22)

Which pair of English letters appears unchanged even after lateral inversion in a plane mirror?

Explanation:

Link:

Question (23)

A student stands 3 m in front of a mirror. What is the distance between the student and the image?

Explanation:

Link:

Question (24)

Which statement about the image formed by a plane mirror is correct?

Explanation:

Link:

Question (25)

In a pinhole camera, the image formed is

Explanation:

Link:

Question (26)

A student observes a tree using a pinhole camera. The top of the tree appears at the

Explanation:

Link:

Question (27)

Which statement about a pinhole camera is correct?

Explanation:

Link:

Question (28)

A periscope made using two plane mirrors helps a person to

Explanation:

Link:

Question (29)

A kaleidoscope produces many beautiful patterns mainly because of

Explanation:

Link:

Question (30)

The Indian government promotes the use of LED lamps mainly because LEDs

Explanation:

Link:

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