NEET Physics: Questions 988 - 991 of 2098

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Question number: 988

» Ray Optics » Snell's Law

MCQ▾

Question

A light beam is travelling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II, III and IV are no,n02,n06andn08 respectively. The angle of incidence θ for which the beam just misses entering Region IV is,

Beam Travelling from Region I to Region IV

Beam Travelling From Region I to Region IV

In figure beam is travelling from region I to region IV. n0, n02, n06 andn08 are the refractive indexes of region I, II, III and IV respectively.

Choices

Choice (4) Response

a.

sin1(34)

b.

sin1(18)

c.

sin1(13)

d.

sin1(14)

Question number: 989

» Ray Optics » Mirror Formula

MCQ▾

Question

convex mirror is used to form the image of an object. Which of the following statements is wrong?

Choices

Choice (4) Response

a.

The image lies between the pole and the focus

b.

The image is diminished in size

c.

The image is real

d.

The image is erect

Question number: 990

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

Light wave is travelling along + y-direction. If the corresponding E vector at that time is along + x-direction, B vector must be directed along.

Choices

Choice (4) Response

a.

Y-axis

b.

X-axis

c.

+ Z axis

d.

- Z axis

Question number: 991

» Electromagnetic Waves » Applications of Electromagnetic Waves

MCQ▾

Question

Choose the wrong statement for E. M. wave.

Choices

Choice (4) Response

a.

They are transverse

b.

They are produced by accelerated charges

c.

They travel with same speed in all medium

d.

They travel in vacuum with the speed of light

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