Module 4 - 4.4.2 Electromagnetic Waves Flashcards
1
Q
Radio Waves
A
λ = few cms
2
Q
Microwaves
A
λ = 10^-3 m
3
Q
Infrared
A
λ = 10^-6 m
4
Q
Visible Waves
A
λ = 5x10^-7 m
5
Q
Ultraviolet
A
λ = 10^-9 m
6
Q
X-Rays
A
λ = 10^-12 m
7
Q
Gamma Rays
A
λ = 10^-12 m
8
Q
Non-Ionising Radiation
A
- radio, micro, infrared, visible
- not enough photon energy
- deemed relatively safe
9
Q
Ionising Radiation
A
- ultraviolet, x rays, gamma
- high enough photon energy
- dangerous
10
Q
All Electromagnetic Waves
A
- travel through a vacuum at the speed of light
- are transverse waves
11
Q
Radio waves are formed when
A
Electrons are oscillated by electric fields in aerials
