A screen is placed 2m away from the lens to obtain the diffraction pat – McqOptions

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1.	A screen is placed 2m away from the lens to obtain the diffraction pattern in the focal plane of the lens in a single slit diffraction experiment. What will be the slit width if the first minimum lies 5 mm on either side of the central maximum when plane light waves of wavelength 4000 are incident on the slit?
A.	0.16 mm
B.	0.26 mm
C.	0.36 mm
D.	0.46 mm
Answer» B. 0.26 mm

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