WavesWave speed = Frequency x Wavelength Metres/second

m/sHertz

HzMetres

m

What is the wave speed when the frequency of a wave is 2.5Hz and the wavelength is 4m?

What is the wave speed when the frequency of a wave is 5Hz and the wavelength is 10m?

What is the wave speed when the frequency of a wave is 12Hz and the wavelength is 2m?

10 m/s50 m/s 24 m/s

This is a diagram of a wave.

Match A,B,C,D with numbers 1,2,3,4 in the table. 3

2

1

4

Many everyday devices use electromagnetic waves…

Match the electro magnetic waves (A,B,C,D) with the devices (1,2,3,4)

A Infra Red C Radio WavesB Microwaves D Visible Light

23

4

1

This diagram shows an atom…

Match parts of the atom (A,B,C,D) with the labels (1,2,3,4) on the atom.

A Electron C Nucleus

B Neutron D Proton

2

4 1

3

The graph shows the count rate from a gamma radiation after it has passed through different thickness of concrete.

A = 8B= 12C = 30D = 60

The count rate when there is no concrete = ___1___ counts per second.

The thickness of the concrete when the count rate is 10 counts per second __2__ cm.

The thickness of the concrete needed to reduce the count rate by half = __3__ cm.

The reduction in count rate when the thickness of concrete is measured from 30 to 60 cm = __4__ counts per second. A

D

C

B

Electromagnetic Waves can be grouped into types. Each type has a different range of wavelengths. Match the types of radiation (A,B,C,D) with numbers (1-4) in the table.

A = MicrowavesB = X-RaysC = Visible LightD = Radio Waves

31

24