EM Waves

Question 1

Radio waves

Answer 1

Wavelength 10^3m
Frequency 10^2 Hz
How do they form = currents
Uses + dangers = navigation / standard radios / no dangers

Question 2

Microwaves

Answer 2

Wavelength = 10^-2m
Frequency = 10^8 Hz
Formation = currents of higher frequency than radio waves
Uses + dangers = cooking / wifi / internal tissue heating

Question 3

Infrared

Answer 3

Wavelength = 10^-5m
Frequency = 10^12 Hz
Formation = infra red LED lights
Uses + Dangers = thermal + security cameras can cause burns and eye damage

Question 4

Visible light

Answer 4

Wavelength = 10^-7m
Frequency = 10^14 Hz
Formation = sun / bulbs
Uses + dangers = photography / illumination / can damage eye

Question 5

Ultra-violet

Answer 5

Wavelength = 10^-8m
Frequency = 10^16 Hz
Formation = high temperature surfaces
Uses + dangers = killing bacteria / premature ageing of skin / skin cancer

Question 6

X-ray

Answer 6

U = 10^-10m
Frequency = 10^19Hz
Formation = X-ray tubes
Uses + danger = medical imaging / can cause cancer

Question 7

Gamma

Answer 7

Wavelength = 10^-12m
Frequency = 10^23 Hz
Formation = radioactive materials
Uses + dangers = sterilisation / treat cancer / can destroy living cells and can cause cancer

Question 8

Speed in vacuum

Answer 8

All 3 x 10^8