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The phenomenon of interference is not observed by two sodium lamps of the same power. It is because both waves have:
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Important Questions on Wave Optics
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Coherent sources can be obtained:
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In interference of light derived from two slit apertures, if at some point on the screen, yellow light has a path difference of then the fringe at that point will be:
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Two beams of light having intensities and interfere to produce a fringe pattern on a screen. The phase difference between the beams is at point and at point . Then the difference between resultant intensities at and is
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The amplitude of waves observed by two light sources of the same wavelength are and and have a phase difference of between them. Then the minimum intensity of light will be proportional to:
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If the intensity of the waves observed by two coherent sources is I. Then the intensity of resultant wave in constructive interference will be :
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If intensity of each of the two waves is I and they are having phase difference of 120º, when the waves are superimposed, then the resultant intensity will be :
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Ratio of intensity of two waves is . If interference occurs, then ratio of maximum and minimum intensity should be:-
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The intensity of two waves is 2 and 3 unit, then average intensity of light in the overlapping region will have the value :
