uses of EM radiation
- Created by: abic1
- Created on: 03-05-16 19:24
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- uses of EM radiation
- non ionising radiation transfers energy and heats things up
- the more intense and the longer the exposure the hotter it gets
- microwaves heat food in microwaves
- infrared radiation cooks food in ovens
- microwaves make particles vibrate
- when particles vibrate they heat up
- water molecules absorb microwaves so food is heated up
- microwave ovens have metal cases and glass screens to reflect and absorb the microwaves
- microwaves are used to send signals between mobiles and phone masts
- phones emit microwaves which some are absorbed by the body
- microwaves heat body tissues which some people think may cause health problems
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