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30 Cards in this Set
- Front
- Back
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Absolute Magnitude
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Apparent magnitude from 10 Parsecs away
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Absorption Spectrum
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Black Bands through cold gas
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Acceleration
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Change of Velocity over time Meters per sec. per sec.
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Antimatter
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Matter with opposite charge
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Apparent Magnitude
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Brightness of a body as apparent from earth
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Blackbody Radiation Curve
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Radiates at every wavelength, frequency at which radiation is highest is indication of temperature.
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Blue Shift
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Decrease in wavelength from a source moving closer to us.
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Continuous Spectrum
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Spectrum in which the radiation is distributed over all frequencies, As in blackbody radiation.
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Deuteron
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1 proton+1 Neutron
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Doppler effect
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Higher frequency at approach than recession
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emission spectrum
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thin gasses colored bands
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force
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influence causing change in speed, direction or shape
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frequency
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the # of wave crests passing any given point in a unit time
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gamma rays
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ray of very high frequency & short wavelength
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Inverse square law
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the law a field follows if its strength decreases w// the square of the distance. Decreases rapidly but never to 0
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Joule
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SI unit of energy
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light year
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10 Trillion Km
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Luminosity
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total energy radiated per second in all wavelengths
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neutrino
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massless, chargeless particle, product of fusion, moves near speed of light, doesn't interact w/matter
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parallax
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apparent motion of relatively close object w/respect to further ones.
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Parsec
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the distance a star must be for its measured parallax to be 1 arc second
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Radio Waves
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lower spectrum
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red shift
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from objects moving away, a longer and redder wavelength
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Arcsecond
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arcsecond is 1⁄3,600 of a degree, is one sixtieth (1⁄60) of one minute of arc.
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Visible light
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400-700nm
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Watt
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1 Joule/sec.
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X-Rays
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High freq.short waves
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Newton's 1st law
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inertia
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Newton's 2nd Law
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heavier objects require more force to move the same distance as lighter objects. F=MA
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Newton's 3rd Law
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For every action there is an equal and opposite re-action.
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