Solving for Refractive Index: Light Beam Incident on Glass Slide

[eltavo809]

Homework Statement

A light beam incident on a glass slide at an angle of 60 ˚, being partly reflected and partly refracted. It notes that reflected and refracted beams are each at 90 ˚ What is the refractive index of glass?

Homework Equations

n₁sinσ₁ = n₂sinσ₂

The Attempt at a Solution

σ₁ = 60°
σ₂ = 30°

sinσ₁ / sinσ₂ = n

So, is this right?

 

[Stonebridge]

Yes, it looks fine.