Electromagnetic Spectrum Flashcards
Why are radio waves good for communication?
they can be received over a large area and they can be reflected by the ionosphere and be transmitted further.
why are microwaves good for communication?
able to pass through the ionosphere and be received through satellites.
How are radio waves produced?
through electronic oscillators coupled to broadcast antennas.
What is a radio wave used for?
mobile phones, industrial ovens
how are microwaves produced?
solid state diodes
what are microwaves used for?
domestic oven, satellite communications
how are infrared waves produced?
LED, lasers
what are infrared waves used for
night vision cameras, movement detectors.
how are visible light wave produced?
outer electrons transitions.
What are visible light waves used for?
illumination, signalling.
how are ultra violet waves produced?
outer electrons transmissions
what are ultra violet waves used for
insect vision, tanning and photosynthesis.
how are x-ray waves produced?
inner electron excitation and decay.
what are x-ray waves used for?
medical imaging.
how are gamma rays produced?
nuclear reactions
