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Question

In Young's double slit experiment, two slits 4 mm apart, are illuminated by a light of wavelength 600 nm. What will be the fringe width on a screen placed 2 m from the slits?

A
0.3 mm
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B
3 mm
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C
4 mm
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D
0.12 mm
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Solution

The correct option is A 0.3 mm
The fringe width is given by,

β=λDd=6×107×24×103

=3×104 m
=0.3 mm

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