Electromagnetic Waves Flashcards
Are disturbances that transfer energy from one place to another without transferring matter
Waves
Are waves that do not require a medium to transfer energy
Electromagnetic waves
Properties of electromagnetic waves
1) They do not require any material or medium for propagation
2) They are produced by accelerated or oscillating charge
3) EM waves travel in vaccum at the speed of 3x10 raise to 8 or 300,000,000
He discovered that an electric current can create a magnetic field
Hans Christian Oersted
He had produced a magnetic attraction and repulsion without the use of any magnets all of it was generated by electricity
Andre-Marie Ampere
He called this electrodynamics
Andre-Marie Ampere
He concluded that changing a magnetic field produces an electric field
Michael Faraday
Conducted his own experiments about electromagnetic induction using electromagnets
Joseph Henry
He predicted the existence of Electromagnetic waves and created a formula about this
James Clerk Maxwell
Discovered radio waves and verified Maxwell’s theory
Heinrich Hertz
Is the distance from one crest to the next or from one trough to the next
Wavelength
The unit of Wavelength is
Meter
Is the number of cycles of a wave in 1 second
Frequency
Is the unit of frequency
Hertz
Higher frequency….
Short Wavelength
