Sound and Light Revision

Waves that need a medium to travel.

• Mechanical Wave

• Electromagnetic Wave

• Longitudinal Wave

• Latitudinal Wave

What are examples of a medium?

• Water

• Air

• Glass

• Diamond

What type of wave is this?

• Longitudinal

• Transverse

• Mechanical

• Electromagnetic

Label the FIRST compression and the LAST rarefaction on the wave.

a

b

Rarefaction

Compression

These waves have...

• similar frequencies

• different frequencies

• similar amplitudes

• different amplitudes

These waves have

• similar amplitudes

• different amplitudes

• similar frequencies

• different frequencies

Compared to the left sound wave, the right sound wave will sound...

• louder

• softer

• lower pitched

• higher pitched

Compared to the left sound wave, the right sound wave will sound...

• louder

• softer

• lower pitched

• higher pitched

Which of the following are true of sound?

• Made by vibrating sources

• Cannot travel in a vacuum

• Vibrations are parallel to wave motion

• Vibrations are perpendicular to wave motion

Frequency is...

• number of vibrations per unit time

• time for one full vibration

• equal to 1 divided by the period of the wave

• measured in hertz