Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Ch 3 RAD 150
Electromagnetic Energy
| Question | Answer |
|---|---|
| Electromagnetic energy exists over a wide range called an energy _____. | continuum |
| An x-ray photon is a ____ of electromagnetic energy. | quantum |
| _____ _______ showed that visible light has both electric and magnetic properties. | James Maxwell |
| The velocity of all electromagnetic radiation is _______. | 3x10 to the eighth m/s |
| Simplistically, sine waves are variations of _____ over time. | amplitude |
| _______ is one half the range from crest to valley over which the sine wave varies. | Amplitude |
| One hertz (Hz) is equal to __ cycle per second. | one |
| _______ is the number of wavelengths that pass a point of observation per second. | Frequency |
| As frequency increases, wavelength will ______. | decrease |
| Wavelength is represented by the greek letter _____. | lambda |
| Frequency is expressed in _____; wavelength (lambda) is expressed in _____. | hertz; meters |
| A photons energy is directly proportional to its ______. | frequency |
| The ____ _____ ____ applies to all electromagnetic radiation. | inverse square law |
| The ______ is the distance from one crest another, from one valley to another or from any point on the sine wave to the next corresponding point. | wavelength |
| As the velocity decreases, the _____ decreases proportionately. | frequency |
| At a given velocity, wavelength and ______ are inversely proportional. | frequency |
| The _____ range of electromagnetic energy extends from approximately 10 (2) to 10 (24) Hz. | frequency |
| The deviation of light when it passes from one transparent medium to another is called _____. | refraction |
| _________ have low energies and long wavelengths. | Radio frequencies |
| Microwave radiation has a ____ wavelength. | short |
| The only difference between x-rays and gamma rays is their _____. | origin |
| X-rays are emitted from the _______, while gamma rays come from inside the ____ of a radioactive atom. | electron cloud; nucleus |
| The phenomenon in which light and x ray photons behave like particles and waves is called _____ ______. | wave-particle duality |
| Electromagnetic energy _______ is the reduction in intensity that results from scattering and absorption. | attenuation |
| What are the three degrees of interaction between light and an absorbing material? | transparency, translucency and opacity |
| Structures that absorb x rays are called _____. | radiopaque (bone) |
| Structures that transmit x rays are called ______. | radiolucent (lungs) |
| Radiation intensity is ______ related to the square of the distance from the source. | inversely |
| The inverse square law can be applied to distanced greater than ___ times the longest dimension of the source. | seven |
| X ray energy ranges from __ keV to __ MeV | 10 - 50 |
| What is Planck's Quantum equation? | E=hf |
| Planck's constant is symbolized by the letter __ and has a numeric value of ____ eVs. | h; 4.15 x 10 (-15) |
| The longer the wave length of electromagnetic energy, the ____ the energy of each photon. | lower |
| Which law states that matter can be neither created nor destroyed? | Law of conservation of matter |
| Which law states that energy can be neither created nor destroyed? | Law of conservation of energy |
| _____ _____ is an example of converting matter into energy. | Nuclear fission |
| One ____ is equal to 6.24 x 10 (18) eV | Joule |
| What is the wave equation? | velocity= frequency x wavelength |
| What is the electromagnetic wave equation? | constant=frequency x wavelength (lambda) f=c/wavelength wavelength=c/f |
Created by:
teachable monkeys
Popular Radiology sets