uses of electomagnetic wave
Answers
Answer:
1..Radio Waves (communications)
TV and FM radio (short wavelength)
Direct line of sight with transmitter (do not diffract)
Medium wavelength – travel further because they reflect from layers in the atmosphere
2..Satellite signals (Microwaves)
Frequency of microwaves pass easily through atmosphere and clouds
Cooking (Microwaves)
Microwaves are absorbed by water molecules.
These water molecules become heated > heat food
Dangers: microwaves are absorbed by living tissue Internal heating will damage or kill cells
3..Infrared Radiation (remote controls, toasters)
Any object that radiates heat radiates Infrared Radiation
Infrared Radiation is absorbed by all materials and causes heating
It is used for night vision and security cameras as Infrared Radiation is visible in daytime or night-time
Police use it to catch criminals, army use it to detect enemy
Dangers: damage to cells (burns)
4..Ultraviolet
Dangers:
over-exposure to UVA and B damages surface cells and eyes and can cause cancer.