Question: X-rays with wavelength 8.33A (0.833 nm) coming from a point source can be reflected at shallow angles of incidence from a plane mirror. The direct

X-rays with wavelength 8.33˚A (0.833 nm) coming from a point source can be reflected at shallow angles of incidence from a plane mirror. The direct ray from a point source to a detector 3m away interferes with the reflected ray to produce fringes with spacing 25 μm. Calculate the distance of the X-ray source from the mirror plane.

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