Double-slit arrangement is covered with thin plastic plate

Reference no: EM13666824

One slit of a double-slit arrangement is covered with a thin plastic plate of refractive index, 1.4, and the other by a thin plastic of refractive index 1.7. the point on the screen at which the central maximum fell before the plastic plates were inserted is now occupied by what had been the 5th bright fringe. Assuming that lambda=480 nm and that the plates have the similar thickness t, find t.

Reference no: EM13666824

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