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CBSE Class 12-science Answered

Find the thickness of the plate and the wavelength of the incident light.
Asked by devjuly | 09 Jun, 2011, 09:02: PM
answered-by-expert Expert Answer
fringe width = lamda D/d
lamda = (0.25X 10-3 )d
 
dnew = d+ 1.2 X 10 -3
New fringe width = 2lamda/3d = lamda/(d+ 1.25 X 10-3)
 
Now can solve for lamda and d
Answered by | 15 Jun, 2011, 01:22: PM

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