Exam 3 Flashcards
(15 cards)
How does an MRI work
Different nuclei are affected by radio waves of different frequencies when in a strong magnetic field
How can lasers be used in medical purposes?
Laser surgery and depigmentation
Radioactive decay can be used for dating but…
Depends on a rough time span that is relevant to the age of the material and the right radio-isotope with the right half life
Geothermal Energy, what is it, where does it come from and what is some limitations of it?
Heat within the earth from nuclear reactions, mostly radioactive decay and location
Current Nuclear Energy uses what reaction and what are it’s challenges
Energy from fission, challenges include not being renewable, radioactive water disposal,used in nuclear bombs dropped in Japan
What can help our energy situation no matter what energy source we use?
Conservation
Cleaner safer nuclear power plants for the future would use what kind of reaction and why don’t we use it now?
Fusion, being able to control energy released and we are putting more energy into it to start reaction than we get out
White light contains what colors?
All colors
Imaging technique that uses nuclear magnetic resonance
MRI
If a light source emits all of the possible wavelengths of visible light all at once, what color do we perceive this light to be?
White
What we experience as color is due to which attributes of light?
Wavelengths
What color we see an object depends on …
3 things
- What color the light is that hits the object
- What molecules the object is made of (what colors they absorb or not)
- What colors are reflected off the object
Electro magnetic radiation is also known as
Light
Light consists of… Name 3
- massless wavicle called photons
- electromagnetic radiation
- packets of energy that can be absorbed or emitted by electrons
Energy found in short and long waves
Long wavelength= low energy
Short wavelength= high energy
