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According to Huygen’s theory of secondary wavelets, following can be explained,

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Important Questions on Wave Optics

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Huygen's theory of secondary waves can be used to find,
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The main drawback of Huygen's theory was,
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The energy in the phenomenon of interference,

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The resultant amplitude in interference with two coherent sources depends upon:
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Which of the following nature of light waves is supported by the phenomenon of interference?
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For distinct interference pattern to be observed, necessary condition is that ratio of intensity of light emission by both the sources should be: