waves Flashcards
what’s the doppler effect
as noise comes closer
frequency is higher
because wave fronts are closer
as noise passes awat
frequency is lower
because wavefront are further apart
similarities of EM waves
all transverse
all travel in vacuum
all travel at speed of light
what are radio waves used for
communication
what are microwaves used for
heating food
communication
what are infrared rays used for
remote controls
heating
what is visible light used for
taking photos
what is UV used for
security marking
what are X rays used for
x ray images
what are gamma rays used for
sterilisation
treatinf cancer
what’s the danger of microwaves
cause internal heat damage
dangers of infrared waves
skin burn
dangers of visible light
eye damage
dangers of UV
sunburn
skin cancer
dangers of x ray
mutation
cancer
dangers of gamma rays
mutation
cancer
