A slit of size 0.15 cm is placed at 2.1 m from a screen. On illuminate – McqOptions

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1.	A slit of size 0.15 cm is placed at 2.1 m from a screen. On illuminated it by a light of wavelength 5 ´ 10?5 cm. The width of central maxima will be [RPMT 1999]
A.	70 mm
B.	0.14 mm
C.	1.4 mm
D.	0.14 cm
Answer» D. 0.14 cm

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