6.6.2.4 Uses and Applications of Electromagnetic Waves Flashcards
1
Q
What are the uses of radio waves?
A
- television
- radio
2
Q
Why are radio waves used for television and radio?
A
- long wavelength
- can travel far without losing quality
3
Q
What are the uses of microwaves?
A
- satellite communications
- cooking food
4
Q
Why are microwaves used for satellite communications and cooking food?
A
- can penetrate atmosphere to reach satellites
5
Q
What are the uses of infrared waves?
A
- electrical heaters
- cooking food
- infrared cameras
6
Q
Why are infrared waves used for electrical heaters. cooking food and infrared cameras?
A
- transfers thermal energy
7
Q
What are the uses of visible light waves?
A
- fibre optic communications
8
Q
Why are visible light waves used for fibre optic communications?
A
- best reflection/scattering in glass
- others have too short/long wavelengths
9
Q
What are the uses of ultraviolet waves?
A
- energy efficient lamps
- sun tanning
10
Q
Why are ultraviolet waves used for energy efficient lamps and sun tannning?
A
- radiates the least heat but more energy
11
Q
What are the uses of x-rays and gamma rays?
A
- medical imaging
- treatments
12
Q
Why are x-rays and gamma rays used for medical imaging and treatments?
A
- very high in energy
- can penetrate material easily
