The part of the eye that controls the amount of light entering is MCQ with Answer and Explanation

Question Report Error

The part of the eye that controls the amount of light entering is

A. Lens

B. Cornea

C. Iris

D. Retina

Answer: Option C

Solution (By JKExamLibrary)

Iris adjusts pupil size.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

A convex lens forms a real and inverted image of same size when object is at

A. F

B. Infinity

C. 2F

D. Between F and 2F

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Correct Answer: Option C

Explanation:
At 2F, image at 2F, same size, real inverted.

This question belongs to: Science Physics

Question #2 Report Error

The law of inertia was given by

A. Kepler

B. Galileo

C. Copernicus

D. Newton

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Correct Answer: Option B

Explanation:
Galileo first stated the concept; Newton formalized as first law.

This question belongs to: Science Physics

Question #3 Report Error

Free fall: height h takes time t. Height 4h takes time:

A. 2t

B. t

C. 4t

D. t/2

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Correct Answer: Option A

Explanation:
h = ½gt² ⇒ t ∝ √h. If h' = 4h, t' = √4 × t = 2t. Time doubles when height quadruples. Memory aid: 'Free fall: t ∝ √h; 4× height ⇒ 2× time'. Kinematics proportionality frequently tested in competitive exams.

This question belongs to: Science Physics

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