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Stars & Galaxies Unit 1
Terms in this set (31)
Light from the sun takes ____ to reach Earth.
One cubic centimeter of water contains a mass of ____.
On the absolute temperature scale (Kelvin), your body temperature is about ____.
Compared to radio waves, visible light has _____.
higher energy and shorter wavelength
The correct value and correct scientific notation for the speed of light in a vacuum is ____.
2.99792458*10^8 meters per sceond
Ultra-violet radiation is inherently _____ than visible radiation.
At approximately 310 Kelvin, our bodies mostly emit ____.
The energy in a photon is _____ related to its wavelength and _____ related to its frequency.
The electrons orbital cloud of an atom is _____ times larger than the atom's nucleus.
one hundred thousand
Absorption or emission of photons by charged particles must be accompanied by _____.
a charge in the energy processed by the charged particle
DeBroglie's model of the atom interprets the electron within the atom like _____.
A rainbow is an example of _____.
a continuum spectrum
In order to perform gamma-ray astronomy, we must _____.
place our collector outside of the Earth's atmosphere
The characteristic of an atom which defines which element it is, is _____.
the number of protons in the nucleus
The diameter of the Sun is about ____.
109 Earth diameters
The Sun has a volume of _____.
over 1 million Earths
Sufficiently dense matter will produce a ____.
smooth continuous spectrum containing all colors
The spectral lines of hydrogen are strong in the Sun because ____.
the Sun is mostly hydrogen
Where does the Sun get its energy?
A nuclear fusion reaction results in ____.
building heavier nuclei from lighter ones
How many types of PP chain reactions are there?
The Sun will be able to convert about ___ percent of its Hydrogen mass into Helium.
The solution to the Solar Neutrino Problem _____.
is that a neutrino can oscillate through multiple neutrino types.
The effect of the Earth's atmosphere on the spectrum of the Sun ____.
adds additional absorption lines to the Sun's spectrum
The Sun's luminosity at its surface is diluted by distance. The remaining luminosity at the distance of the Earth is called ____.
The radiation energy liberated by nuclear fusion in the Sun's core is in the form of ____.
If Sunspots appear dark, Stefan-Boltzmann's Law tells us that they are ____ than the photosphere.
The Solar Activity Cycle is about ____ years long.
Almost all of the Sun's EM radiation radiates from the ____.
The peak frequency of the Solar Photosphere, according to Wien's law, is in the ____.
The Sun does not rotate as a rigid body because ____.
it is made of gas
THIS SET IS OFTEN IN FOLDERS WITH...
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