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In a Young’s double slit experiment, the source illuminating the slits is changed from blue to violet. The width of the fringes

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In a Young’s double slit experiment, the source illuminating the slits is changed from blue to violet. The width of the fringes
A. increases
B. remaisn constant
C. decrease
D. none of these
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Correct Answer - C
`betaproplamda`
decreases since wavelength of voilet colour is less then wavelength of blue colour.
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