What is the half angular width of the central bright maximum in the Fr – McqOptions

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1.	What is the half angular width of the central bright maximum in the Fraunhofer diffraction pattern of a slit of width 12 X 10^-7m when the slit is illuminated by monochromatic light of wavelength 6000 .
A.	20
B.	30
C.	40
D.	50
Answer» C. 40

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