Waves

Question 1

Radio Waves

(effects and use)

Answer 1

EFFECT : Probably none

USE : Communication and Radar

(Low Frequency - Long Wavelength)

Question 2

Microwave

(effects and use)

Answer 2

EFFECT : Heating of water in tissues can cause burning

USE : Satellite communication and cooking

Question 3

Inferred

(effects and use)

Answer 3

EFFECT : Can cause burning in tissues

USE : Remote control and thermal imaging

Question 4

Visible

(effects and use)

Answer 4

EFFECT : Activate sensitive cells in the retina

USE : optical fibbers

Question 5

UV rays

(effects and use)

Answer 5

EFFECT : High doses kill cells and low doses cause cancer

USE : fluorescent tubes and sunbeds

Question 6

X-ray

(effects and use)

Answer 6

EFFECT : High doses kill cells and low doses cause cancer

USE : Images inside the body

Question 7

Gamma

(effects and use)

Answer 7

EFFECT : High doses kill cells and lower doses cause cancer

USE : Treat tumours and sterilise hospital equipment

(High Frequency - Short Wavelength)

Question 8

Remember

Answer 8

Raging Martians Invaded Venus Using X-ray Guns

Question 9

Transverse Waves

Answer 9

Bottom = Trough

Top = Crest/Peak

Difference in Top = Wavelength

Horizontal line to Peak = Amplitude

• Direction of energy is perpendicular as the direction of wave travel

Question 10

Longitudinal Waves

Answer 10

Difference in compressed part = Compression

Difference of one compressed part to a difference compressed part = Wavelength

Difference of wide parts = Rarefaction

• Direction of energy travel is the same as the direction of wave travel

Question 11

All Electromagnetic Waves

Answer 11

Transverse waves

Can travel through a vacuum

Travel at the speed of light
(3 x 10^8)