# Wave Optics-Diffraction Due to a Single Slit Width of Central Maximum (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 5 - 9 of 17

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## Question number: 5

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

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

## Question number: 6

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

MCQ▾

### Question

Light of wavelength 6328 Å is incident normally on slit having a width of 0.2 mm. The width of the central maximum measured from minimum to minimum of diffraction pattern on a screen 9.0 meters away will be about –

### Choices

Choice (4) Response

a.

0.36°

b.

0.09°

c.

0.18°

d.

0.72°

## Question number: 7

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

MCQ▾

### Question

A slit of size 0.15 cm is placed at 2.1 m from a screen. On illuminating it by a light of wavelength 5 × 10 -5 cm, the width of central maxima will be

### Choices

Choice (4) Response

a.

70 mm

b.

0.14 cm

c.

1.4 mm

d.

0.14 mm

## Question number: 8

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

MCQ▾

### Question

In Fresnel’s biprism experiment distance of m th bright fringe from zeroth order fringe will be –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 9

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

MCQ▾

### Question

What will be the angle of diffraction for the first minimum due to Fraunhoffer diffraction with sources of light of wave length 550 nm and slit width 0.55 mm?

### Choices

Choice (4) Response

a.

b.