Chapter 12 - Waves

Question 1

Describe how longitudinal waves are transmitted
Give an example

Answer 1

Oscillations parallel to the energy transfer
E.g. Sound waves

Question 2

Describe how transverse waves are transmitted
Give an example

Answer 2

Oscillations perpendicular to the energy transfer
E.g. EM waves

Question 3

Define wavelength

Answer 3

Distance between 2 points on a wave.

Question 4

Define amplitude

Answer 4

The maximum height of an oscillation

Question 5

Define frequency

Answer 5

Number of waves passing a point per second

Question 6

Define period

Answer 6

Time taken for wave to pass a point

Question 7

What is the Law of Reflection?

Answer 7

Angle of reflection (r) = Angle of incidence (i)

Question 8

When is a wave able to reflect?

Answer 8

When a wave hits a boundary between 2 mediums.

Question 9

Define refraction

Answer 9

When a wave changes direction while passing through 2 mediums.

Question 10

What happens to light as it speeds up or slows down?

Answer 10

If light speeds up, it bends away from the normal.

As it slows down, it bends towards the normal.