Revision - Unit 3 - Waves

Choose the appliances that use EM Waves.

EM = Electromagnetic

• Phone

• Microwave

• TV remote

• All of these

A wave is a transfer of _________.

• energy

• matter

Which is the correct wavelength?

• A

• B

Which is the correct amplitude?

• A

• B

The red wave has a ... (1)

The blue wave has a ...(2)

• 1 - high frequency

  2 - low frequency

• 1 - low frequency

  2 - high frequency

• 1 - high amplitude

  2 - low amplitude

• 1 - low amplitude

  2 - high amplitude

The time to produce one wave =

• Frequency

• Period

The number of waves per second =

• Frequency

• Period

Imagine you have created water waves with a frequency of 5 HZ.

How many waves will pass a particular point in 6 seconds?

• 5X6 = 30 waves

• 6/5 = 1.2 waves

What is the frequency of this wave?

• 4 Hz

• 1/4 Hz

What is the period of this wave?

• 4 seconds

• 1/4 seconds