EM Spectrum Flashcards
1
Q
EM Spectrum
A
Continuous range of electromagnetic radiation differing in frequency and wavelength
2
Q
Spectrum in order of increasing frequency (decreasing wavelength)
A
- Radio waves
- Microwaves
- Infrared
- Visible Light
- UV
- X-rays
- Gamma
3
Q
Gamma Uses
A
- Sterilising equipment
- Radiotherapy
- Medical imaging
4
Q
X-ray Uses
A
- Medical imaging
- Airport security
5
Q
UV Uses
A
- Tanning skin
- Black lights at clubs
6
Q
Visible Light Uses
A
- Photography
- TV
- Fibre optics
7
Q
Infrared Uses
A
- Cooking
- Remote controls
- IR cameras
8
Q
Microwave Uses
A
- Cooking
- Communication
- Mobile phone communication
9
Q
Radio Wave Uses
A
- Communication
10
Q
Producing Radio Waves
A
Transmitter: electrons move up and down inside a wire (produces radio waves)
Aerial: radio waves are received and electrons in the aerial wire move up and down
Radio waves have same frequency as the current in the circuit
11
Q
Wave Equation
A
Speed v Frequency x Wavelength
v = fλ
12
Q
Spectrum in order of increasing wavelength (decreasing frequency)
A
- Gamma
- X-rays
- UV
- Visible Light
- Infrared
- Microwaves
- Radio waves
13
Q
Speed of Light
A
3 x10-8 m/s
14
Q
What type of waves are EM waves?
A
Transverse
15
Q
All EM waves travel at the speed of light in a vacuum
A
