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The path difference between two interfer...

The path difference between two interfering waves at a point on screen is 171.5 times the wavelength if the path difference is 0.01029 cm find the wavelength.

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Path difference `=171.5lamda=(343)/(2)lamda=` odd multiple of half wavelength. It means dark finge is observed
Accoding to question `0.01029=(343)/(2)lamdaimplieslamda=(0.01029xx2)/(343)=6xx10^(-5)cmimplieslamda=6000Å`
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