Refraction & Snell's Law – AP Physics 2

1. When light passes from air into glass, it bends:

Away from the normal Toward the normal Not at all Parallel to surface

2. Total internal reflection occurs when:

n₁ < n₂ and θ₁ > θc n₁ > n₂ and θ₁ > θc At any angle with n₁ > n₂ n₁ = n₂

3. The speed of light in glass (n=1.5) is approximately:

3 × 10⁸ m/s 2 × 10⁸ m/s 1.5 × 10⁸ m/s 4.5 × 10⁸ m/s