Interference pattern is obtained with a red light of wavelength 6400overset@A. The source is then replaced by another light of wavelength 4000overset@A. It is found that nth bright fringes of first source coincides with (n + 3)th bright fringe of second source. The order of fringe n is :

Interference pattern is obtained with a red light of wavelength 6400ov

1.	Interference pattern is obtained with a red light of wavelength 6400overset@A. The source is then replaced by another light of wavelength 4000overset@A. It is found that nth bright fringes of first source coincides with (n + 3)th bright fringe of second source. The order of fringe n is :
Answer» 3 4 5 6 Answer :C

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Interference pattern is obtained with a red light of wavelength 6400overset@A. The source is then replaced by another light of wavelength 4000overset@A. It is found that nth bright fringes of first source coincides with (n + 3)th bright fringe of second source. The order of fringe n is :

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