# Wave Optics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 15 - 18 of 64

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## Question number: 15

» Wave Optics » Young's Double Slit Experiment

MCQ▾

### Question

The width of one of the two slits in a Young’s double slit experiment is double of the other slit. Assuming that the amplitude of the light is coming from a slit is proportional to slit-width. Find the ratio of the maximum to the minimum intensity in the interference pattern.

### Choices

Choice (4) Response

a.

9: 1

b.

16: 1

c.

34: 1

d.

4: 1

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## Question number: 16

» Wave Optics » Young's Double Slit Experiment

MCQ▾

### Question

Interference fringes were produced in Young’s double slit experiment using light of wave length 5000 Å. When a film of material 2.5 × 10 -3 cm thick was placed over one of die slits, the fringe pattern shifted by a distance equal to 20 fringe width. The refractive index of the material of die film cannot be

(1) 1.25 (2) 1.33

(3) 1.5 (4) 1.4

Select the correct answers and mark it according to the following codes:

Codes:

### Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1,2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

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## Question number: 17

MCQ▾

### Question

A parallel beam of monochromatic light is incident on a narrow rectangular slit of width 1mm. When the diffraction pattern is seen on a screen placed at a distance of 2m. The width of principal maxima is found to be 2.5 mm. The wave length of light is-

### Choices

Choice (4) Response

a.

5890 nm

b.

6250 nm

c.

6000 nm

d.

6200 nm

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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

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