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Light of wavelength 5000 Å is incident o...

Light of wavelength 5000 Å is incident on a slit of width 0.1 mm. Find out the width of the central bright line on a screen distance 2m from the slit?

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`w_(X)=(2flamda)/(a)=(2xx2xx5xx10^(-7))/(10^(-4))=20mm`
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