Electromagnetic Energy Ch 4 Flashcards
The type of energy in x-rays, radio waves,
microwaves & visible light
Electromagnetic Energy
Properties of Electromagnetic Energy
Frequency, Wavelength, Velocity &
Amplitude
An uninterrupted ordered sequence
Energy Continuum
The smallest quantity of any type of
electromagnetic energy
Photon
A small bundle of energy
Quantum
An x-ray photon is a quantum of
electromagnetic energy
He showed that visible light has both
electric & magnetic properties
James Clerk Maxwell
The velocity of all electromagnetic radiation is
3 x 108 m/s
The interactions among different energies,
forces or masses
Field
It governs the interaction of different masses
Gravitational Field
It governs the interactions of electrostatic
charges
Electric Field
It governs the interaction of magnetic poles
Magnetic Field
The variation in the movement of photons in
electrical & magnetic fields
Sine Wave
The width of a waveform
Amplitude
It describes variations in electric &
magnetic fields as photon travels with
velocity
Sine Wave Model of Electromagnetic Energy
the number of wavelengths that
pass a p
oint of observation per second
Frequency
Three Wave Parameters
Velocity, Frequency & Wavelength
When is wavelength & frequency
inversely proportional
At a given velocity
A continuum of electromagnetic energy
Electromagnetic Spectrum
The wave of moving molecules
Ultrasound
Diagnostic ultrasound is not part of…
electromagnetic spectrum
Measurement of the Electromagnetic Spectrum
energy (eV), frequency (Hz)
& wavelength (λ)
It occupies the smallest segment of
electromagnetic spectrum
Visible Ligh
The deviation of course that occurs when
photos of visible light traveling in straight
lines pass from one transparent medium to
another
Refraction
It heats any substance on which it shines
Infarred
Higher energy & lower wavelength
Ionizing Radiation
It is emitted from the electron cloud
X-rays
It comes from inside the nucleus of
radioactive atom
Gamma Rays
only difference between x
-rays & gamma
rays is..
Their origin
They behave more like waves
Visible Light Photons
They behave more like particles
X-ray Photons
The principle that states that both wave &
particle concepts must be retained, because
wave-like properties are exhibited in some
experiments & particle-like properties are
exhibited in other
Wave Particle duality
All radiation with λ longer than x-rays
Wave Phenomenon
Visible light behaves like a…
Wave
Xrays behave like they have…
Paticles
The structures that absorb x-rays
Radiopaque
The structures that transmit x-rays
Radiolucent
It states that the intensity of radiation at a
location is inversely proportional to the
square of distance from the source of
radiation
Inverse Square Law
Formula if Inverse Square Law
I1/I2 = (D2/D1)2
Electromagnetic energy (radiation) intensity is…
inversely related to the square of the distance
from the source
discrete bundle of energy!
X-ray photon
X-rays are created with the speed of light (c)
Planck’s Quantum Theory
Synthesized our understanding of Electromagnetic radiation
Max Planck
States that matter can neither be created nor destroyed
Law of Conservation of Matter
States that energy may be transformed from one form to another but cannot be created or destroyed
Law of Conservation of Energy
