Electromagnetic radiation Flashcards
what is a wave length
the distance form any point in a wave to the same point in the next wave (cycle)
how is wave length represented
Lambda ^
what are the 2 waveforms used
electromagnetic radiation & electrical current
for electromagnetic radiation… the x axis is always what
DISTANCE ( M, Mm, NM) not TIME
for electromagnetic radiation…..the Y & Z axis is what
electrical & magnetic fields
for electrical current… the x axis is always what
TIME (sec, min, mili sec)
for electrical current…the y axis is what
being measured (volts)
what is amplitude
peak intensity on the Y axis (highest voltage, Greatest force)
what is frequency
the number of waves per second (function/variable)
what is frequency measured in?
Hertz (Hz) or cycles per second (c/s)
what is the relationship between frequency & wavelength
as wavelength decreases, frequency increases
inverse relationship
does amplitude have a relationship with frequency and wavelength
No
what are the characteristics of the electromagnetic specturm
no mass- non particulate
no charge
travel in waves
travel @same speed (velocity)
In order from LOW energy to HIGH energy, list the members of the magnetic spectrum
Radio waves
microwaves
Infrared radiation
ultraviolet (UV)
x-rays
Gamma rays
Describe x ray frequency and wavelength
High frequency
short wavelength
why is it called electro magnetic radiation
EMR exist in BOTH electric and magnetic fields
what are properties of EMR described as
waves of energy
bundles of energy
EMR travels as a bundle of energy called what
Photons
what is wave-particle duality
the co-existence of EMR waves & photons
why is it called a spectrum
no gaps between energy
no gaps within each region
All EMR travels at the same what
velocity (speed)
what does velocity (C) equal
3x10^8
186,000 miles/second
what is the wave equation
velocity (C) = frequency x wavelength (^)
what kind of relationship does frequency & energy have
directly proportional
what is the energy equation
energy = planck’s constant x frequency
when you adjust energy what are you adjusting
kVp
changing frequency & wavelength
what EMR are non ionizing radiation?
radio waves
micro waves
infrared
visible light
what EMR are ionizing
Ultra violet
x rays
gamma rays
