physics rev 3 - pt 1 Flashcards
(18 cards)
o The result of vibrations between electric and
magnetic fields
Electromagnetic waves
o Can travel through air, solid materials, and a
vacuum
o Light waves are called electromagnetic waves
Electromagnetic waves
o Transverse waves that do not need a medium
to travel (unlike mechanical waves)
Electromagnetic waves
o Longest wavelength
o Lowest frequency
o Used for communication
radiowaves
Visible spectrum
o ROYGBIV (Red
Indigo Violet)
Invisible spectrum (6)
o Radio wave
o Microwave
o Infrared
o Ultraviolet
o X-ray
o Gamma ray
o RADAR
o Used for communication andfood
microwave
o Sun is a natural source of visible light
o Visible spectrum
Visible light
o Can be felt as heat from the lightbulb or stove
infrared
o UVA and UVB
o Used for medical, dental, and forensic use.
uv light
o Can penetrate the soft tissues such as skin
o Used for medical, and dental uses
x ray
o Highest frequency EM
o Destroys living cells
gamma ray
o Created by any vibration caused by an object o Travels through a medium (e.g. air, water)
Sound waves
o Highest part of the wave
crest
Maximum distance waves are displaced from its resting position
amplitude
Distance between two consecutive crests or troughs
wavelength
Number of oscillations per second
frequency
Time it takes for the wave to move from one crest to another
period
