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Monochrmoatic light of wavelength 500nm ...

Monochrmoatic light of wavelength `500nm` from a narrow slit is incident on the double slit. If the separation of 10 fringes on the screen 1m away is `1cms`. Find the slit separation.

Text Solution

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`nbeta=1xx10^(-2)`
`:.beta=(10^(-2))/(n)=(10^(-2))/(10)/(10)=10^(-3)m`
`beta=(lambdaD)/(d)`
`impliesd=(lambdaD)/(beta)=2.5xx10^(-4)m`
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Knowledge Check

  • A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2m away. The distance between the fist dark fringes on either side of the central bright fringe is

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