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10 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is science?
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Organized and classified knowledge
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What is the definition of physics?
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The science that deals with occurrences in nature embracing mechanics, heat, light, sound, electricity and magnetism and the structures and properties of matter
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What are the 2 types of mechanical energy?
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1. kinetic - motion
2. potential - stored name 5 other types of energy |
1. heat
2. chemical 3. electrical 4. nuclear 5. electromagnetic |
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State the 3 fold law of conservation of energy
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1. energy can neither be created or destroyed
2. total amount of energy in the universe is constant 3. energy will flow from a higher to a lower level in the absence of outside work |
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What is an isotope?
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atom with the same atomic number (same number of protons) with a different atomic weight (different number of neutrons)
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What is ionization?
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addition or removal of an electron from an atom resulting in an ion pair.
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What are the 6 methods of ionization?
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1. x-ray bombardment of matter
2. thermionic emission 3. electron stream bombardment 4. spontaneous breakdown of radioactive materials 5. light ray bombardment of certain materials 6. chemical ionization which 2 are we most concerned with as it relates to radiography? |
the first 2:
1. x-ray bombardment of matter and 2. thermionic emission |
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What is thermionic emission?
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the boiling off of electrons on the filament
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When dealing with the electromagnetic spectrum what does velocity equal to?
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The speed of light
Define wavelength and frequency |
wavelength is the distance between two successive points on a wave and frequency is the number of waves that pass in a particular time frame
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List the 12 properties of X-rays
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1. Highly penetrating invisible rays
2. Electrically neutral 3. Polyenergetic and heterogeneous 4. Release very small amounts of heat 5. Travel in straight lines 6. Travel at the speed of light 7. Can ionize matter 8. Cause fluorescence of certain crystals 9. Cannot be focused by a lens 10. Affect photographic film 11. Produce chemical and biological changes in matter through ionization and excitation 12. Produce secondary and scatter radiation |
INPHSSIFFFCS
IN-PHSS-I-FFF-CS Invisible Neutal Polyenergetic Heat Straight lines Speed of light Ionize matter Fluorescence Focused Film Changes Scatter |
