Spring 2 (P12) Flashcards
1
Q
Radio Waves
A
Comes from Technology. No effects on body. Carries information on radio waves. Has a low frequency.
2
Q
Microwaves
A
Technology. Some microwaves can be absorbed, causing heatings of cells which can be dangerous. Microwaves can be used for satellites communication or TV satellites.
3
Q
Infrared Radiation
A
Comes from all objects. Can heat the body and burn skin. Can cook food, raise temperature and absorb IR radiation .
4
Q
Visible light
A
Comes from the sun. Visible light absorbed by skin reflection. Can cause heating affects. One use is to look at objects and communication.
5
Q
Ultraviolet (UV)
A
Comes from the sun. Can give people suntans. One use is to disinfect water. UV is used as security pens too.
6
Q
X-Rays
A
Source is a beam of electrons.
