Ray Optics (BITSAT Physics): Questions 1 - 5 of 10

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Question number: 1

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

MCQ▾

Question

In an equilateral triangular prism, the angle of minimum derivation for a certain wavelength is 40° . The corresponding angle of incidence is –

Choices

Choice (4) Response

a.

50°

b.

30°

c.

45°

d.

40°

Question number: 2

» Ray Optics » Reflection and Refraction of Light

MCQ▾

Question

If the critical angle for total internal reflection from a medium to vacuum is 30° . Then velocity of light in the medium is –

Choices

Choice (4) Response

a.

2×108ms

b.

1.5×108ms

c.

0.75×108ms

d.

3×108ms

Question number: 3

» Ray Optics » Power of a Lens

MCQ▾

Question

Two lenses whose powers are +2D and 4D , respectively. The Power of Combination will be –

Choices

Choice (4) Response

a.

4D

b.

+4D

c.

+2D

d.

2D

Question number: 4

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

MCQ▾

Question

The diameter of the objective lenses of a telescope is 0.5m and wave length of light is 6000 . The limit of resolution of this telescope is –

Choices

Choice (4) Response

a.

0.03sec

b.

3.03sec

c.

0.15sec

d.

0.06sec

Question number: 5

» Ray Optics » Snell's Law

MCQ▾

Question

A ray of light is incident on the surface of separation of a medium with the velocity of light at an angle 450 and is refracted in the medium at an angle 30° . What will be the velocity of light in the medium?

Choices

Choice (4) Response

a.

3.33×108ms

b.

3.18×108ms

c.

1.96×108ms

d.

2.12×108ms

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