Wave Optics-Diffraction Due to a Single Slit Width of Central Maximum (NEET 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.

(2m+1)λD2d

b.

(2m1)λD2d

c.

mDλd

d.

mdλD

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.

l rad

b.

0.01 rad

c.

0.1 rad

d.

0.001 rad

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