A beam of monochromatic light is incident on a plane transmission grat – McqOptions

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1.	A beam of monochromatic light is incident on a plane transmission grating having 5000 lines/cm and the second order spectral line is found to be diffracted at 30 . The wavelength of the light is _______
A.	4000
B.	5000
C.	6000
D.	7000
Answer» C. 6000

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