Electromagnetic waves Flashcards
1
Q
What type of waves are EM waves
A
- All EM waves are transverse waves
2
Q
What is the same about all EM waves
A
- All EM waves travel at the same speed
- This is 3 x 10^8 m/s in a vacuum
- This speed varies in different mediums (refraction)
3
Q
What differentiates different EM waves
A
- All EM waves have different wavelengths and frequency
- These two are inversely related (as one increases, the other decreases)
- This means that the speed is always the same of all waves
4
Q
What is the entire EM spectrum
A
- Radio waves
- Microwaves
- Infrared waves
- Visible light
- Ultraviolet
- X-rays
- Gamma rays
5
Q
Which waves are used in communication
A
- Radio waves
- Microwaves
6
Q
Which waves are considered ionising
A
- Ultraviolet
- X-rays
- Gamma rays
7
Q
What is visible light
A
- Light that can be seen by the human eye
- All of the colours
8
Q
Where do EM waves come from
A
- EM waves come from everywhere
