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156 Week 2

Part 1

QuestionAnswer
The capacity to do work, produce motion, or cause physical and chemical changes in matter Energy
Energy emitted and transmitted as either Electromagnetic Waves or Particulate Matter
Natural Radiation is about 49%
Man Made Radiation is about 51%
The Largest Natural Source of Radiation is Radon and Thoron Gases
The Largest Man-Made source of Radiation is Medical Imaging
Who developed the Electromagnetic Theory (1860’s) James Clerk Maxwell
Energy that travels through space as a combination of electric fields and magnetic fields at the speed of light Electromagnetic Energy
ALL Electromagnetic Radiation Has no mass • Has no charge • Travels at the same speed • Travel in straight lines
Electromagnetic Radiation Varies only in their Energy (electron volts), Wavelength, and Frequency
_________ is a way of ordering or grouping the different electromagnetic radiations by frequency and wavelength Electromagnetic Spectrum
Amplitude (A) height of the wave from the centerline to the crest
Wavelength (λ) distance between successive crests
Frequency (f) number of wavelengths (cycles) passing a point each second
Frequency (f) is measured in Hertz (Hz)
The relationship between wavelength and frequency is Inverse
Longer Wavelength (larger number)- Lower Frequency (smaller number)
Shorter Wavelength (smaller number)- Higher Frequency (larger number)
X-rays behave as particles when interacting with matter Particle Theory
Who Described the relationship between radiation energy & frequency? Max Planck
X-ray photon energy is directly proportional to x-ray photon frequency Planck’s Quantum Theory
Electromagnetic radiation can also be characterized by how it Interacts with matter
The intensity of electromagnetic radiation ________ over distance Diminishes
Electromagnetic Radiation Travels as a _____ Wave
Electromagnetic Radiation Interacts with matter like _____ Particles
What is the smallest quantity of electromagnetic energy? Photon
As __________, Frequency Decreases Wavelength Increases
When you multiply frequency and wavelength, you always get _________ The Speed of Light (c)
Intensity Photons in the primary beam before interactions
Wavelength (λ) is measured in- Nanometers (nm)
Created by: user-2016295
 

 



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