A point is emitting light of wavelength 6000Å is placed at a very small height h above a flat reflecting surface MN as shown in the figure.The intensity of the reflected light is 36% of the incident intensity.Interference fringes are observed on a screen placed parallel to the reflecting surface at a very large distance D from it. If the intensity at pbe maximum then the minimum distance through which the reflecting suface MN should be displaced so that at P again becomes a mixture.?

A point is emitting light of wavelength 6000Å is placed at a very sma

1.	A point is emitting light of wavelength 6000Å is placed at a very small height h above a flat reflecting surface MN as shown in the figure.The intensity of the reflected light is 36% of the incident intensity.Interference fringes are observed on a screen placed parallel to the reflecting surface at a very large distance D from it. If the intensity at pbe maximum then the minimum distance through which the reflecting suface MN should be displaced so that at P again becomes a mixture.?
Answer» `3XX10^(-10)m` `6XX10^(-10)m` `1.5xx10^(-10)m` `12XX10^(-10)m` ANSWER :A

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