The width of fringe is 2 mm on the screen in a double slit experiment for the light of wavelength of 400 nm. The width of the fringe for the light of wavelength 600 nm will be:
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Verified by ExpertsThe correct answer is:
D
For a light of wavelength A, the fringe width in double slit experiment is given by
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For a light of wavelength A', the fringe width is given by
…
Divide equation by equation and simplify to obtain the fringe width for the later case.
...
Substitute the values of the known parameters into equation to calculate the required fringe width.
= 3 mm
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