Question

In Young's double slit experiment, monochromatic light of wavelength 5000 Å is used. The slits are 1.0 mm apart and screen is placed at 1.0 m away from slits. The distance from the centre of the screen where intensity becomes half of the maximum intensity for the first time is___ x 10^-6 m.

Answer 1

Correct answer is : 125

\(\lambda\) = 5000 Å  d = 1 x 10^-3 m

D = 1 m

\(\Delta x = dsin \theta\)  ...(i)

⇒ For intensity

From (i)