Two identical light sources `S_1` and `S_2` emit light of same wavelength `lambda`. These light rays will exhibit interference ifA. (a) Their phase differences remain constantB. (b) Their phases are distributed randomlyC. (c) Their light intensities remain constantD. (d) Their light intensities change randomly

Two identical light sources `S_1` and `S_2` emit light of same wavelen

1.	Two identical light sources `S_1` and `S_2` emit light of same wavelength `lambda`. These light rays will exhibit interference ifA. (a) Their phase differences remain constantB. (b) Their phases are distributed randomlyC. (c) Their light intensities remain constantD. (d) Their light intensities change randomly
Answer» Correct Answer - A For interference phase difference must be constant.

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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`
Find the half angular width of the central bright maximum in the fraunhofer diffraction pattern of a slit of width `12xx10^(-5)cm` when the slit is illuminated by monochromatic light of wavelength 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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