In a Young's double slit experiment, 12 ...

In a Young's double slit experiment, 12 fringes are observed to be formed in a certain segment of the screen when light of wavelength 600nm is used. If the wavelength of light is changed to 400nm, number of fringes observed in the same segment of the screen is given by

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The correct Answer is:

`(12lambda_1D)/(d)=(klambda_2D)/(d)` , `k=(12xx600)/(400)=18`

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