# Wave Optics-Brewster's Law [NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 1 - 5 of 5

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## Question number: 1

» Wave Optics » Brewster's Law

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MCQ▾

### Question

When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30°, the reflected light is found to be completely plane polarized. Determine refractive index of given material –

### Choices

Choice (4)Response

a.

b.

2

c.

d.

## Question number: 2

» Wave Optics » Brewster's Law

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MCQ▾

### Question

A light has amplitude A and angle between analyser and polariser is 60°. Light transmitted by analyser has amplitude

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 3

» Wave Optics » Brewster's Law

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MCQ▾

### Question

Image of sun formed due to reflection at air water interface is found to be very highly polarized. Refractive index of water being , find the angle of sun above the horizon.

### Choices

Choice (4)Response

a.

46.9°

b.

36.9°

c.

26.9°

d.

16.9°

## Question number: 4

» Wave Optics » Brewster's Law

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MCQ▾

### Question

A ray of light is incident on the surface of a glass plate at an angle of incidence equal to Brewster’s angle Φ. If μ represents the refractive index of glass with respect to air, then the angle between reflected and refracted rays is,

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 5

» Wave Optics » Brewster's Law

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MCQ▾

### Question

Consider a light beam incident from air to a glass slab at Brewster’s angle as shown in Fig. A polaroid is placed in the path of the emergent ray at point Pand rotated about an axis passing through the center and perpendicular to the plane of the polaroid.

### Choices

Choice (4)Response

a.

The intensity of light as seen through the Polaroid shall be independent of the rotation.

b.

For a particular orientation there shall be darkness as observed through the polaoid.

c.

The intensity of light as seen through the Polaroid shall go through a minimum for four orientations of the Polaroid.

d.

The intensity of light as seen through the Polaroid shall go through a minimum but not zero for two orientations of the Polaroid.

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