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  • In two separate set ups of Young's double slit experiment, fringes of equal width are observed when lights of wavelengths in the ratio 1:2 are used. If the ratio of slit separation in two cases

In two separate set ups of Young's double slit experiment, fringes of equal width are observed when lights of wavelengths in the ratio 1:2 are used. If the ratio of slit separation in two cases is 2:1, then ratio of distances between the plane of slits and the screen in the two set ups is

Option: 1

1: 2


Option: 2

2: 1


Option: 3

1: 4


Option: 4

4: 1


Answers (1)

best_answer

\mathrm{\beta=\frac{\lambda_{1} D_{1}}{d_{1}}=\frac{\lambda_{2} D_{2}}{d_{2}}}

\mathrm{\therefore \frac{D_{1}}{D_{2}}=\frac{d_{1}}{d_{2}} \times \frac{\lambda_{2}}{\lambda_{1}}=\frac{2}{1} \times \frac{2}{1}=4: 1}

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Anam Khan

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