Albert Teen

YOU ARE LEARNING:

Understanding Refraction

# Understanding Refraction

### Understanding Refraction

Refraction causes waves to change speed, direction and wavelength, but the frequency does not change.

Imagine you're running along a beach and you decide to run into the water. Does the water increase or decrease your speed?

When a light ray goes from traveling through air to travelling through water, what do you think happens to its speed?

Which medium do you think is denser?

Different media have different densities. Does the speed of a wave depend on the medium it's travelling through? Answer with either yes or no.

1

When a wave changes in speed when it goes from one medium to another, it is being refracted.

Refraction occurs when a wave travels between media of different densities.

2

From looking at the diagram, what other feature of the wave is changing because of refraction?

A) Its wavelength. B) Its direction. C) Both its direction and wavelength.

What features of a wave are affected by refraction?