A ray of light is incident normally on one of the refracting surfaces of a prism of refracting angle 60^@. The emergent ray grazes the other refracting surface. Find the refractive index of the material of the prism.

A ray of light is incident normally on one of the refracting surfaces

1.	A ray of light is incident normally on one of the refracting surfaces of a prism of refracting angle 60^@. The emergent ray grazes the other refracting surface. Find the refractive index of the material of the prism.
Answer» <html><body><p>1.155<br/>1.75<br/>1.25<br/>1</p>Answer :A</body></html>