waves Flashcards
what do waves transfer
energy without matter
what are transverse waves
they are waves that have high peaks and vibrate at right angle#
eg: light
what are longitudinal waves
they are waves that are formed by compression and vibrate towards the same direction
eg: sound
what is amplitude
the distance from the equilibrium of the wave
what is the wave front
it is the joining points of a wave
what is a frequency
it is the number of waves
what is a wave length
the distance from one wave to another
what is a time period
it is the time taken to form one wave
what is the speed of a wave equal to
the frequency x wave length
what is the doppler effect
it is the increase or decrease of the frequency of waves as they move closer together
when do waves reflect
when travelling from a medium of low density to a medium of a higher density
when do waves refract
when the waves speed causes it change medium
what happens when a wave goes from a low density to a higher
the speed decreases
what happens when a wave goes from a high density to a low
the speed increases
what is the electromagnetic spectrum
radio waves, microwaves, infrared waves, visible waves, ultra violet, X-rays and gamma rays
what are radio waves used for
television and radios
what are microwaves used for
cooking
what are infrared waves used for
heating
what are visible waves used for
photography
what are ultra-violet rays used for
to sterilise equipment
what are X-rays used for
security
what are gamma rays used for
hospital and medical equipment
what are the hazards of waves
internal burning, cancer, skin cancer, and mutations
