Question

in a young double slit exp the separation between the slit is 2mm, the wavelength of the light used is 5896 angst and distance D between the screen and slit is 100cm
It is found that the angular width of the fringe is 0.20 degree
To increase the fringe width by 0.21 degree (with same value of wavelength and D) the separation between the slits needs to be changed to :

a. 1.8 mm
b. 1.9 mm
c. 1.7 mm
d. 2.1 mm​

Answer 1

dh to cm do di di ni ex di to