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. `3xx10^(-10)m`B. `6xx10^(-10)m`C. `1.5xx10^(-10)m`D. `12xx10^(-10)m`

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

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.?A. `3xx10^(-10)m`B. `6xx10^(-10)m`C. `1.5xx10^(-10)m`D. `12xx10^(-10)m`
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Angular width of central maxima in the Fraunhofer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength `6000Å`. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will beA. `3500 Å`B. `4200 Å`C. `4700 Å`D. `6000 Å`
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Light wavelength 6000 Å is incident normally on a slit of width `24xx10^(-5)` cm. find out the angular position of seconds minimum from central maximum?

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