Question

Coherent light of wavelength 633 nm from a Helium Neon laser falls on a double slit with a slit separation of 0.103 mm. An interference pattern is produced on the screen 2.56 m away from the slits. a) how far from the central maximum is the third interference maximum? b) what about the third interference minimum?

Answer 1

d I Given: A = 633x109 m, d = 0,103810 ²m D=2156 m. disth of third maxima from central masina - 3 = 3DX 3x2.56% 633 8109 0.1038103 3 z = 4.72x10 m ) difth of third winima from central maxin Hy = 501 = SX2156X 6338109 a 2 di 2x 0.1038103 X 3 = 3.93 x 10-2 m.