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11 Cards in this Set

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Andromeda Galaxy
2.5 million light years away
closest galaxy to our own
impossible to get to
radiation
energy is transmitted through space with no physical contact (any space)
electromagnetic
has an electrical type component and magnetic type component
period
number of seconds needed for wace to repeat it's self
wavelength
number of meters for the wave to repeat in a given time
amplitude
height of the wave relative to normal
frequency
number of wave crests passing a given point per unit time (per sec.)
1
f = -----------
period
Hertz
the frequency of waves you're picking up
speed of light
3 * 10^5 km
C= ----
second
electromagnetic wave
magnetic component is perpendicular to electrical component
infared radiation
where heat comes from