Question

In Young's double slit experiment, distance between the slits is 0.6mm. When the screen
is kept at a distance of 100cm from the slits, the distance of ninth bright fringe from the
centre of the fringe system is 8.835mm. Find the wavelength of light used.​

Answer 1

Answer:

Given:

D=1.5m

d=0.3mm

d

2λD

=6mm

⇒λ=

2D

d×6

nm

⇒λ=

2×1.5×10

9

0.3×10

6

×6×10

6

nm

This gives, λ=600nm