Question

wavelength of light is 600 nm. Find the wave length in metre and micron​

Answer 1

Answer:

for a dark fringe to form

D

dy

=λ

y=

d

Dλ

=

10

−3

2×600×10

−9

=1.2mm

distance between the first dark fringes on either side of central bright fringe is 2×y=2.4mm