Q: 19 (NDA-II/2008)

A ray of light is incident normally on one of the faces of right angled isosceles prism as shown below. It undergoes total internal reflection from hypotenuse.
Which one of the following is the minimum refractive index of the material of the prism?
question_subject: 
Science
question_year: 
2008
question_exam: 
NDA-II
stats: 
0,104,200,64,128,104,8