Term 2 Week 3 2016

Homework

• Ex 3G, p.76-79, Two Point Source Interference
• Ex 3H, p.81-83, Wave Reflection
• Ex 3I, p. 85-87, Wave refraction
• Ex 3B, p.47-52, Light Refration

Refraction of Light

v1/v2 = 𝛌1/𝛌2 = sin(𝜭1)/sin(𝜭2) = n2/n1 ← Wave Refraction

n1sin(𝜭1) = n2sin(𝜭2) ← Snell’s Law (light only)

Critical Angle

This is when the refracted angle equals 90o

Therefore sin(𝜭c) = n2/n1

PhET Simulation on Light Refraction

Use this simulation when answering questions to help your understanding