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A slit of size 0.15m is placed at 2.1m f...

A slit of size `0.15m` is placed at `2.1m` from a screen. On illuminated it by a light of wavelength `5xx10^-5cm`. The width of central maxima will be

A

70 mm

B

0.14 mm

C

1.4 mm

D

0.14 cm

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