engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Physics Waves Interference of Waves
In a biprism experiment, the slit is illuminated by the wavelength of 6000 A°. The distance between the slit and the eyepiece is 0.6 m. The two virtual images of the slit are formed 0.3 mm apart. If eyepiece is displaced 20 cm away from the slit, the change in fringe width will be
1
0.6 mm
2
0.4 mm
3
0.2 mm
4
0.1 mm