# Wave Optics (NEET Physics): Questions 18 - 22 of 64

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## Question number: 18

» Wave Optics » Young's Double Slit Experiment

MCQ▾

### Question

The intensity of the light coming from one of the slits in a young’s double slit experiment is double the intensity from the other slit. Find the ratio of the maximum intensity to the minimum intensity in the interference fringe pattern observed.

### Choices

Choice (4) Response

a.

9: 1

b.

34: 1

c.

4: 1

d.

16: 1

## Question number: 19

» Wave Optics » Wavefront

MCQ▾

### Question

When a wave of wavelength 0.2 cm is made incident normally on a slit of width 0.004m, then the semi-angular width of central maximum of diffraction pattern will be

### Choices

Choice (4) Response

a.

b.

30°

c.

60°

d.

90°

## Question number: 20

» Wave Optics » Young's Double Slit Experiment

MCQ▾

### Question

In Young’s double slit experiment, white light is used. The separation between the slits is b. The screen is at a distance d (d > > b) from the slits. Some wavelengths are missing exactly in front of one slit. One of these wavelengths is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 21

» Wave Optics » Huygens' Principle

MCQ▾

### Question

In an interference pattern, at a point we observe the 16 th order maximum for λ 1= 6000A. What order will be visible here if the source is replaced by light of wavelength? λ 2 = 4800 Å

### Choices

Choice (4) Response

a.

40

b.

20

c.

80

d.

10

## Question number: 22

» Wave Optics » Polarization

MCQ▾

### Question

Two Polaroids are oriented with their planes perpendicular to incident light and transmission axis making an angle of 30 0 with each other. What fraction of incident unpolarised light is transmitted?

### Choices

Choice (4) Response

a.

37.5 %

b.

27.5 %

c.

57.5 %

d.

17.5 %

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