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A single-slit diffraction pattern is obtained using a beam of red light. What happens if the red light is replaced by blue light?

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The diffraction pattern disappears.

There is no change in the diffraction pattern.

Diffraction fringes become broader and farther apart.

Diffraction fringes become narrower and crowded together.

answer is B.

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Detailed Solution

The wavelength of blue light is less than that of red light. Hence the angular width of the maxima will decrease which means that the fringes become narrower and crowded together.

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