Question

Two coherent sources are 2.0 mm apart and are illuminated with a monochromatic light of wavelength 5896 X 10-10 m. Fringes are observed at a distance 60 cm from the sources. Find the fringe width?​

Answer 1

how to answer it ; ( example )

Formula,

x=(2n−1)

2d

λD

⇒λ=

(2n−1)D

2xd

=

(2×2−1)×1

2×10

−3

×0.9×10

−3

=6×10

−5

cm

Answer 2

Answer:

393×10^-11

Explanation:

fringe width =( n×wavelength×D)÷d

D distance between two sources

d distance from source to object