Question

A long narrow horizontal slit is paced 1 mm above a horizontal plane mirror. The interference between the light coming directly from the slit and that after reflection is seen on a screen 1⋅0 m away from the slit. Find the fringe-width if the light used has a wavelength of 700 nm.

Answer 1

Answer:

Fringe-width if the light used has a wavelength of 700 nm is 0.35mm

Explanation:

Given:

D=1mm

λ=700nm= 700 x 10 ⁻⁹ m

since a= 1nm

d= 2a=2mm= 2x 10 ⁻³ m

Fringe width =λD/d= 700 x 10 ⁻⁹ x 1m/2 x 10⁻³

=0.35mm

Answer 2

Answer:

iuuh5vv5v5btn8hn

7jm6h7g7 tby 6f t 5ftvg H kill to tip