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Week 8 Assignment

Week 8 Assignment: Study Stack Exam Review

QuestionAnswer
x-ray photon quantum of electromagnetic energy.  Velocity and amplitude
Frequency number of wavelengths that pass a point of observation per second
wavelength distance from one crest to another, from one valley to another, or from any point on the sine wave to the next corresponding point.
Wavelength = Velocity/Frequency λ = c/f
electromagnetic spectrum includes the entire range of electromagnetic energy
Visible light identified by wavelength, RF is identified by frequency, and x-rays are identified by energy.
Radiofrequency Low energy and long wavelength
Electromagnetic energy attenuation reduction in intensity that results from scattering and absorption.
Inverse Square Law  The intensity of electromagnetic radiation is inversely related to the square of the distance from the source
Particle model: quantum theory  The x-ray photon is a discrete bundle of energy.  The energy of a photon is directly proportional to its frequency.  Planck’s quantum equati
Electrostatics study of stationary electric charges
Electrification created by contact, friction, or induction.
Electrostatic laws Unlike charges attract; like charges repel.  Electric charge of a conductor is concentrated along the sharpest curvature of the surface.  Electric charge distribution is uniform throughout or on the surface.
Electric circuits Increasing electric resistance results in a reduced electric current.  The voltage across the total circuit or any portion of the circuit is equal to the current times the resistance
Ohm’s Law The manner in which electric currents behave in an electric circuit  V = IR  V = electric potential in volt  I = electric current in ampere  R = resistance in ohms
otal resistance equal to the sum of the individual resistances
Created by: robertye12
 

 



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