Question

Questions 1. In a single slit experiment, the distance between two dark fringes of the second order is 10 cm on a screen which is 1.5 m away. If the wavelength of the light is 650 nm, find the width of the slit A laser light of A- 633nm shines on a wire and diffraction pattern is found on a screen 1 m away. The distance between the first two bright fringes is 8 cm. Find the diameter on the wire.

Answer 1

Given data In a single slit experiment the distance b/w two dark fringes of the second order is 10 cm on a screen which is 1.5 m away. If the wave length of the light is 650 nm, find the width of the list Apply y/L = m(wavelength)/9 08/1 = (1) (633 times 10^-9)/9 a = 7.91 times 10^-6 m (7.914 m) y/L = m/wavelength)/9 .05/1.5 = (2) (650 times 10^-9)/9 a = 3.9 times 10^-5 m (394 m)