Microwaves
By:-Akshara
What are microwaves?
o
Microwaves are a type of electromagnetic radiation, as are radio waves, ultraviolet radiation, X-rays
and gamma-rays.
o Microwaves are produced by vacuum tube devices that operate on the ballistic motion of electrons
controlled by magnetic or electric fields.
o They have a frequency ranging between 300 MHz to 300 GHz. In contrast the wavelength ranges
from 1mm to around 30 cm
Properties of microwaves
o They are the radiations capable of radiating electromagnetic energy with shorter wavelengths.
o Microwaves are reflected by metal surfaces.
o They can easily pass through glass and plastics.
o They are easily attenuated within shorter distances.
o Microwave radiation can pass through the atmosphere.
o Microwaves travel in a straight line