InterviewSolution
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InterviewSolution
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At a point on the two-slit interference pattern obtained using a source of light of wavelength 6000Å, the pathdifference is 4.2 mu m. Is the point bright or dark? |
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Answer» Solution :Data: Path DIFFERENCE, `Delta= 4.2 xx 10^(-6) m, lambda = 6000 Å= 6 xx 10^(-7)`m Let p be an integer such that `p(lambda/2)= Delta`. `therefore p=(2Delta)/lambda = (2 xx 4.2 xx 10^(-6))/(6 xx 10^(-7)) = (8.4 xx 10)/6` `= 84/6 = 14` Since p is an even integer, the point MUST be BRIGHT. |
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