Question

80- When one mirror of Michelson interferometer is moved a distance of 0.5 mm we observe 2000 fringes. The wavelength of
light used is ...
(a) 5000 nm
(b) 5000 À
(c) 500 m
(d) 2000 À
H​

Answer 1

Explanation:

the correct answer is d option

Answer 2

correct answer is 5000A°

Explanation:

= 1.0/5000

= 0.0005mm per fringe

= 5.0 x 10-7 m = 500 nm

= 5000 angstroms.

Hope this will help