1.

In Young's double-slit experiment, the intensity at a point P on the screen is half the maximum intensity in the interference pattern. If the wavelength of light used is lambda and d is the distance between the slits, the angular separation between point P and the center of the screen is

Answer»

`sin^(-1)((lambda)/(d))`
`sin^(-1)((lambda)/(2D))`
`sin^(-1)((lambda)/(3D))`
`sin^(-1)((lambda)/(4D))`

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