Light MCQ question and answer with solution

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Each section contains 100 MCQs on Light .

Two convex lenses with power 2 D are kept in contact with each other. The focal length of the combined lens system is

A) 0.10 m B) 2 m C) 4 m D) 0.25 m

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Image formed by the plane mirror is

A) Real and laterally erect B) Real and erect C) Virtual and laterally real D) Virtual and laterally inverted

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Twinkling of stars is due to

A) large distance of stars and storms in air B) rotation of earth C) large size of stars D) large distance of stars and fluctuations in the density of air

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Find the position of the image formed by a concave mirror when the object is placed between P and F?

A) At infinity B) Between F and C C) Behind the mirror D) Beyond C

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The focal length of a convex lens is 50 cm. Calculate its power.

A) 4D B) 2D C) 1D D) 3D

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The transverse nature of light waves is confirmed by

A) interference B) diffraction C) polarisation D) total internal reflection

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

What is the unit of refractive index?

A) m^-1 B) Dioptre C) No unit D) m/s

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The part of the eye having the large refractive index is

A) cornea B) aqueous humor C) lens D) vitreous humor

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The refractive index of fused quartz is 1.46 and that of sapphire is 1.77. If V_q is the speed of light in quartz and V_s is the speed of light in sapphire, then which one of the following relations is correct?

A) v_q > v_s B) v_s > v_q C) v_s = v_q D) $${v_s} = \frac{{{v_q}}}{2}$$

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

When an object is placed between C and F, where will the image form in a concave mirror?

A) on F B) infinite C) 2F D) after C

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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Light MCQ question and answer with solution | Physics Gk MCQs