P12.3 Reflection and refraction

Question 1

How can the reflection of waves be investigated?

Answer 1

Using a ripple tank

Question 2

What is the Refraction of waves?

Answer 2

Is the change of the direction in which they are travelling when they cross a boundary between one medium and another medium

Question 3

What is the normal line?

Answer 3

The line which is perpendicular to the plane

Question 4

What is the reflection law?

Answer 4

Where angle of incidence = angle of reflection

Question 5

When can refraction happen?

Answer 5

When any wave changes speed as it passes from one medium to another

Question 6

How does refraction work refraction?

Answer 6

When the wavefronts start to move into the glass these parts of the wavefronts slow down
This causes those parts of the wavefronts to get closer together
Wavelength gets smaller
Causes the waves to change direction
When waves speed up they change direction away from the normal