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Question

In Young's double slit experiment with monochromatic source of light of wavelength 6000A, if the path difference is 1.5×106m, the point becomes :

A
bright band
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B
dark band
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C
sometimes bright and sometimes dark
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D
data insufficient
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Solution

The correct option is B dark band
Here, Δxλ
=1.5×1066000×1010
=2.5
So, here Δxλ is not integer
So, it is a dark bond because at dark
bond Δxλ is non integer.
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