NEET Physics: Questions 995 - 999 of 2098

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Question number: 995

» Ray Optics » Snell's Law

Assertion-Reason▾

Assertion (Ꭺ)

The focal length of a lens is different for all colors of light

Reason (Ꭱ)

The focal length depends only upon the material of the lens.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

Question number: 996

» Ray Optics » Deviation and Dispersion of Light by a Prism

MCQ▾

Question

A prism of dispersive power 0.021 and refractive index 1.53 form an achromatic combination with prism of angle 4.2° and dispersive power 0.045 having refractive index 1.65. Find the resultant deviation.

Choices

Choice (4) Response

a.

4.18°

b.

2.16°

c.

1.12°

d.

3.12°

Question number: 997

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

MCQ▾

Question

Two plane mirrors are inclined at an angle θ. A ray of light is incident on one mirror at an angle of incidence i. The ray is reflected from this mirror, falls on the second mirror from where it is reflected parallel to the first mirror. What is the value of i, the angle of incidence in terms θ?

Choices

Choice (4) Response

a.

3θ - 90°

b.

2θ - 90°

c.

θ - 90°

d.

4θ - 90°

Question number: 998

» Ray Optics » Reflection and Refraction of Light » Smooth Surface

MCQ▾

Question

An air bubble in water acts as,

Choices

Choice (4) Response

a.

A divergent lens

b.

A convergent lens

c.

A plane mirror

d.

None of the above

Question number: 999

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

MCQ▾

Question

Find the number of images formed by two mutually perpendicular mirrors -

Choices

Choice (4) Response

a.

2

b.

4

c.

1

d.

3

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