ko homework Flashcards
Amplitude
Height from centre line
Wavelength
The distance from peak to peak
Frequency
The number of waves passing a point each second
Period
The time for one wave to pass a given point
Oscillation
Movement back and forth
Wave
Transfer of energy with no transfer of particles
Transverse wave
Oscillations are perpendicular to the direction of energy transfer (e.g. EM wave, ripples on water)
Longitudinal wave
Oscillations are parallel to the direction of energy transfer (e.g. sound).
Show areas of compression and rarefaction (spread out)
Use of radio waves
Television and radio
Why are radio waves suitable for television and radio?
Reflected by ionosphere (the ionized part of the Earth’s atmosphere) so can broadcast over long distances.
Use of microwaves
Satellite communications, cooking food
Why are radio waves suitable for satellite communications and cooking food?
Able to pass through the atmosphere to satellites. Has a heating effect.
