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Question (11)

QN0029763

The image formed by a pinhole camera is always

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

Correct Answer: B

Explanation:

Pinhole cameras form real inverted images.

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Question (12)

QN0029764

A student notices that the image in a mirror appears left-right reversed. This effect is called

(A) scattering
(B) refraction
(C) lateral inversion
(D) diffraction

Correct Answer: C

Explanation:

Plane mirrors produce lateral inversion.

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Question (13)

QN0029765

A person is standing 3.5 m away from a mirror. What is the distance between the person and the image?

(A) 3.5 m
(B) 5 m
(C) 7 m
(D) 10.5 m

Correct Answer: C

Explanation:

Total distance = 2 × 3.5 m = 7 m.

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Question (14)

QN0029766

Which material is best suited for making the screen of a pinhole camera?

(A) Transparent plastic sheet
(B) Black cardboard
(C) Tracing paper
(D) Steel plate

Correct Answer: C

Explanation:

Tracing paper acts as a translucent screen.

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Question (15)

QN0029767

A student places an opaque object in the path of light from a torch. What will form on the wall behind the object?

(A) Reflection
(B) Refraction
(C) Shadow
(D) Spectrum

Correct Answer: C

Explanation:

Opaque objects block light and form shadows.

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Question (16)

QN0029768

Which statement is true for the image formed in a plane mirror?

(A) It is smaller than the object
(B) It is real and inverted
(C) It is same size as the object
(D) It forms in front of the mirror

Correct Answer: C

Explanation:

Plane mirrors form same-sized images.

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Question (17)

QN0029769

A pinhole camera image becomes dimmer when the pinhole is made very small because

(A) less light enters
(B) the screen absorbs light
(C) the image becomes virtual
(D) light stops reflecting

Correct Answer: A

Explanation:

Smaller holes allow less light into the camera.

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Question (18)

QN0029770

Which of the following is transparent?

(A) Oiled paper
(B) Wooden plank
(C) Clear glass
(D) Thick cardboard

Correct Answer: C

Explanation:

Transparent materials allow most light to pass through.

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Question (19)

QN0029771

A student walks towards a mirror at 1 m/s. At what speed does the image appear to approach the student?

(A) 0.5 m/s
(B) 1 m/s
(C) 2 m/s
(D) 4 m/s

Correct Answer: C

Explanation:

Relative speed between object and image is doubled.

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Question (20)

QN0029772

During a solar eclipse, a pinhole camera is preferred for observation because it

(A) magnifies sunlight strongly
(B) reflects harmful rays away
(C) allows safe viewing of the Sun’s image
(D) changes sunlight into coloured light

Correct Answer: C

Explanation:

The Sun’s image is viewed indirectly and safely.

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Question (11)

The image formed by a pinhole camera is always

Explanation:

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Question (12)

A student notices that the image in a mirror appears left-right reversed. This effect is called

Explanation:

Link:

Question (13)

A person is standing 3.5 m away from a mirror. What is the distance between the person and the image?

Explanation:

Link:

Question (14)

Which material is best suited for making the screen of a pinhole camera?

Explanation:

Link:

Question (15)

A student places an opaque object in the path of light from a torch. What will form on the wall behind the object?

Explanation:

Link:

Question (16)

Which statement is true for the image formed in a plane mirror?

Explanation:

Link:

Question (17)

A pinhole camera image becomes dimmer when the pinhole is made very small because

Explanation:

Link:

Question (18)

Which of the following is transparent?

Explanation:

Link:

Question (19)

A student walks towards a mirror at 1 m/s. At what speed does the image appear to approach the student?

Explanation:

Link:

Question (20)

During a solar eclipse, a pinhole camera is preferred for observation because it

Explanation:

Link:

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