# Wave Optics-Diffraction Due to a Single Slit Width of Central Maximum (NEET Physics): Questions 16 - 17 of 17

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## Passage

In a Young’s double slit experiment a monochromatic light whose wavelength is λ strikes on the slits, separated by distance d, as shown in the figure. Refractive index of the medium between slits and screen varies with time t as . Here n 0 and k are positive constants. Position of any point P on screen is measure by its -coordinate as shown.

## Question number: 16 (1 of 1 Based on Passage) Show Passage

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

MCQ▾

### Question

If a glass plate of small thickness b is placed in front of S 1. How should its refractive index vary with time so that a central maximum is formed at O?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 17

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

MCQ▾

### Question

Width of slit is 0.3 mm Fraunhofer diffraction is observed in focus plane of lens of a lens of focal length 1 m. If third minima is at 5 mm distance from central maxima, then wavelength of light is-

### Choices

Choice (4) Response

a.

5000 Å

b.

7000 Å

c.

6500 Å

d.

6000 Å

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