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Monin Deshpande
Asked: 2022-11-11T00:49:40+05:30 In:

Light of wavelength `6328 Å` is incident normally on a slit having a width of `0.2 mm`. The distance of the screen from the slit is `0.9 m`. The angular width of the central maximum is
A. `0.09^(@)`
B. `0.72^(@)`
C. `0.18^(@)`
D. `0.36^(@)`

Light of wavelength `6328 Å` is incident normally on a slit having a width of `0.2 mm`. The distance of the screen from the slit is `0.9 m`. The angular width of the central maximum is
A. `0.09^(@)`
B. `0.72^(@)`
C. `0.18^(@)`
D. `0.36^(@)`
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  1. Correct Answer – D
    Angular width of central maximum
    `theta_(0)=(2lambda)/a=(2xx6328xx10^(-10))/(0.2xx10^(-3))=6.328xx10^(-3) rad`
    `=[(6.328xx10^(-3))xx180/pi]^(@)=0.36^(@)`

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