Using monochromatic light of wavelength \[\lambda ,\] an experimentalist sets up the Youngs double slit experiment in three ways as shown. |
If she observes that \[y=\beta ',\] the wavelength of light used is: [JEE ONLINE 09-04-2014] |
A) 520 nm
B) 540 nm
C) 560 nm
D) 580 nm
Correct Answer: B
Solution :
[b] Given |
n = 2 (from figure) |
Applying formula |
or, |
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