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Q. The width of the diffraction band varies

In This post you will get answer of Q.
The width of the diffraction band varies

Solution:

Width of the diffraction band is given by

$ beta = frac{lambda D}{d} $

where D = distance between slit and the screen,

$ lambda = $ wavelength of light used and

$ $ d = width of slit.

Hence, width of the diffraction band varies directly as the distance between the slit and the screen.

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