Electromagnetic Waves

Question 1

Light wave facts

Answer 1

All visible light travels at the same speed
All transverse waves
They all travel through a vacuum

Question 2

Order of waves

Answer 2

Radio waves
Micro waves 
Infra red 
Visible light
Ultra violet 
X-rays 
Gamma rays

Question 3

Order of waves (wavelength and frequency)

Answer 3

Decreasing wavelength

Increasing frequency

Question 4

Uses and dangers of radio waves

Answer 4

Transmit information decoded into sound
Radios/TVs/communication

No dangers

Question 5

Uses and dangers of radio waves

Answer 5

Heating food
Mobile phones
WiFi
Satellite communication

Can leak radiation
Tissue heating

Question 6

Uses and dangers of infra red

Answer 6

Cooking/heating
Communication signals
Night vision

Heating and burning skin
Sun burn
Damage skin and eyes

Question 7

Uses and dangers of visible light

Answer 7

To see
Vitamin d from the sun
Photosynthesis
Internal body clock

Blindness/eye damage

Question 8

Uses and dangers of UV

Answer 8

Tanning
Sterilise produce
Fluorescent inspection
Kill microbes

Skin cancer
Blindness/eye cataracts

Question 9

Uses and dangers of X-Rays

Answer 9

Cancer treatment
Airport security
Faults in metals

Cell mutations - cancer

Question 10

Uses and dangers of gamma rays

Answer 10

Killing living cells
Kills harmful bacteria
Sterilising food and medical equipment
Detect heart and brain abnormalities

Penetrates skin and damages cells
Cell mutations - cancer

Question 11

What is the electromagnetic spectrum

Answer 11

A continuous range of wavelengths or frequencies over which electromagnetic radiation extends

Question 12

What is the electromagnetic spectrum

Answer 12

White light into a prism separates knot 7 different colours - visible spectrum
When they merge its called a continuous spectrum