Waves so far

If you increase the amplitude of a light wave it...

• Gets dimmer

• Changes colour

• Gets brighter

• Gets louder

If you decrease the amplitude of a sound wave it...

• Gets quieter

• Changes louder

• Gets higher pitch

• Gets deeper

If you decrease the frequency of a sound wave it...

• Gets quieter

• Changes louder

• Gets higher pitch

• Gets deeper

If you increase the frequency of a sound wave it...

• Gets quieter

• Changes louder

• Gets higher pitch

• Gets deeper

If you change the frequency of a light wave it...

• Gets quieter

• Changes colour

• Gets brighter

• Gets dimmer

What does 'propagate' mean?

• Spreads out

• Copies

• Gets brighter

• Gets dimmer

Which of these describes how a sound wave propagates?

• When each air particle moves, it can pull on the next air particle, causing that one to move. Once it has pulled the next air particle, it returns to its original position.

• When each air particle moves, it vibrates on the spot.

• When each air particle moves, it can push on the next air particle, causing that one to move. Once it has pushed the next air particle, it returns to its original position.

• When each air particle moves, it can pull on the next air particle, causing that one to move. Once it has pulled the next air particle, it keeps following it.

Describe the motion of a transverse wave and the particles in the wave.

• The wave direction is to the right and the particles always move to the right.

• The wave direction is to the right and the particles always move to the left.

• The wave direction is parallel to the direction that the particles move.

• The wave direction is at right angles (perpendicular) to the direction that the particles move.

The word perpendicular means...

• Parallel to

• In the same direction

• At right angles to

• To the left

A Mexican wave is an example of a...

• Transverse wave

• Longitudinal wave