The Electromagnetic Spectrum Flashcards
0
Q
Speed of light
A
300, 000, 000 m/s
1
Q
All Waves’ properties
A
All transfer energy
All are transverse waves
All travel at speed of light through vacuum
All can be reflected refracted and diffraction
2
Q
Waves from lowest to highest frequency
A
Radio waves Microwaves Infra red Visible light Ultraviolet X-rays Gamma rays
3
Q
Radio wave uses
A
Radio and tv
4
Q
Microwave uses
A
Mobiles phone
Satellite
Communication
Cooking
5
Q
Infra red uses
A
Cooking
Heating
TV and stereo controls
Night vision
6
Q
Visible light uses
A
Seeing
Communicating
Photography
7
Q
Ultra violet uses
A
Fluorescent tubes
UV tanning lamps
8
Q
X-ray uses
A
Observe internal structures
9
Q
Gamma ray uses
A
Sterilising equipment
Radiotherapy
10
Q
Digital signals
A
Information converted into binary code Uses two digits (1 and 0) These are electrical pulses Can be regenerated accurately Easier to design and data easier to process
11
Q
Analogue signals
A
Converted into electrical voltages or currents
Large wave height is amplified wave
Needs wider range of frequencies to broadcast
