# A ray falls on a prism ABC(AB=BC) and travels as shown in adjoining figure.The minimum refraction index of the prism material should be -

37 views
in Physics
closed
A ray falls on a prism ABC(AB=BC) and travels as shown in adjoining figure.The minimum refraction index of the prism material should be -
A. 4//3
B. sqrt2
C. 3//2
D. sqrt3

by (84.0k points)
selected

Since AB=BC, /_BAC=/_ACB=45^@
T.I.R. takes place at AB and BC i.e.
45^@geC
sin45^@gesinC
1/sqrt2ge1/mu
mugesqrt2
mu_(min)=sqrt2