Question

*Q. 55. Describe Young's double-slit - interference
experiment and derive conditions for occurence of
dark and bright fringes on the screen. Define
fringe width and derive a formula for it. (4 marks)
Ing​

Answer 1

Answer:

: In Young's double slit experiment, the fringe width is given by β=Dλ/d=Dc/dv Clearly, (i) When light of smaller frequency (v) is used, fringe width increases. (ii) Wavelength of light in water decreases, so fringe width (β∝λ) also decreases.