Chapter 3 Flashcards
Are used in conjunction with a magnetic field resonance imaging (mri) to create images of the body
Radio waves
What two rays are used for imaging in radiology and nuclear medicine
Gamma and X-rays
What’s one difference between the ends of the spectrum
Only high energy radiation ( X-rays and gamma ray) has the ability to ionize matter
Who developed the electromagnetic theory
James maxwell
All ___________ _________ are very similar in that it has no mass, Carries energy in waves as electric and magnetic disturbance in space and travel at the speed of light
Electromagnetic radiation
Is a way of ordering or grouping the different electron magnetic radiation
Electromagnetic spectrum
All members of the electromagnetic spectrum have the same __________ and vary only in their energy. Wavelength, and frequency.
Velocity
List the electromagnetic spectrum from lowest to highest
Lowest: radiowaves, microwaves, infrared light, visible light, ultraviolet light, X-rays, and gammas rays
The wave length of the electromagnetic spectrum ranges from
10^ 6 to 10^ -16 meters
The frequency ranges from
10^2 to 10^24 hz
True or false electromagnetic energy can exist apart from Matter and travel through a vacuum
True
True or false mechanical energy requires an object or matter to act through
True
Example of mechanical energy
Sound
Electromagnetic formula: E= hf, what does each letter stands for
E - energy
H- Planck constant
F- frequency of photons
E=hf is measured in
Electricon Volts
the ENERGY of the electromagnetic spectrum ranges from
10^-12 to 10^ 10
True or false. Electromagnetic radiation exhibits properties of a wave or particles depending on its energy and in some cases its environment also called wave- particle duality
True
Electromagnetic radiation characteristics
Velocity, amplitude,wavelength, and frequency
All The VELOCITY for electromagnetic are the same
3x10^8 m/s
Refers to the maximum height of a wave
Amplitude
Is measured of the distance from the peak of one wave to the peak of the next wave
Wavelength
Refers to the number of waves that pass a given point per second
Frequency
True or false electromagnetic radiation travels at the same velocity, the relationship between the wavelength and frequency is inverse
True
True or false the longer the wavelength the lower the frequency
True
Wavelength are express through
Meters
Frequency is measured in
Hertz
Formula for calculating wavelength or frequency are
Velocity= frequency x wavelength ( v= f/)
True or false is replaced with C ( constant symbol for speed of light ) new formula is c= f/\
True
When solving for frequency the formula is f= c/\ true or false
True
When solving for wavelength the formula is
/\ = c/f
High energy photon acts more like
Particles
Lower energy radiation acts more like
Waves
The intensity of electromagnetic radiation diminishes by a factor of the square of the distance from the source
Inverse square law
Intensity Formula:I1 / i2 = (d2)^2 / (d1)^2 what does each of these letters stand for
I - luminosity
D- distance
