Physics

Problem

In a Young’s experiment, the slit separation is

d=0.30\,\text{mm}

and the screen is

D=1.2\,\text{m}

away. Monochromatic light of wavelength

\lambda = 600\,\text{nm}

is used. A glass plate of thickness

t = 4.8\,\mu\text{m}

and refractive index

\mu = 1.5

is introduced completely in front of one slit. By how many fringes will the central bright fringe shift on the screen? a) 3 b) 4 c) 2 d) 8