Question

Monochromatic light of wavelength
580 is incident on a slit of width 0.30 :
The screen is 2 from the slit. The width of
the central maximum is

Answer 1

d=580nm=580×10

−9

m

d=0.3mm=0.0003m

width of the cental maxima =

d

2λD

=

0.0003

2×580×10

−9

×2

=0.0077m