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P5: Electromagnetic Spectrum (Uses of waves (Radio (TV, Communication),…
P5: Electromagnetic Spectrum
Uses of waves
Radio
TV
Communication
Micro
Cooking
Communication
Gamma
Sterilise medical equipment
Treat cancer
UV
Can cause the body to produce vitamin D
Can sterilise drug and food products
Infrared
Cooking
Change TV channels
X Rays
Checks for broken bones and fractures
Bone examination
Visible Light
See in the dark
Lamps
Radio waves can transmit further than microwaves because they have a higher frequency
The higher the frequency the lower the wavelength
Shortest wavelength to the longest wavelength
Radio, Microwave, Infrared, Visible Lights, UV, X-Rays and Gamma rays.
2 things all electromagnetic waves have in common
Transverse vibrations in electrical and magnetic waves
Don't need matter to travel through. They can travel through a vacuum
High frequency wave exposure leads to cancer because there is ionizing radiation which shines at the skin and can take some electrons out of the atoms. This damages the DNA in the cells which can lead to cancer.
3 ways to protect yourself from electromagnetic waves
Distance from exposure
Shielding yourself from exposure
Time of exposure