astronomy chapter 8
different isotopes of the same kind of atom vary in
there are number of neutrons
what property of electrons results from the fact that they exist as waves
they can only exist at a very specific energy levels in an atom
most of the light emitted by the sun comes in the form of
visible light
light can be best described as
A form of energy and the wave
what instrument can be used to measure the amounts of different wavelengths of light generated by a distant star
A spectroscope/spectrometer
humans can see the difference in certain wavelengths of light in the form of
Color
when we see light it sometimes appears to be longer or shorter wavelengths than it was emitted at, this is is a result of what?
Doppler shifting
what is the medium through which light passes
Electric and magnetic field's
what type of light on the electromagnetic spectrum has the longest wavelength
Radio waves
what type of light on the electromagnetic spectrum has the lowest energy
Radio waves
in the equation (E is related to 1/lambda) what does E refer to
The energy of an individual photon of light
The wave links that are emitted and absorbed by rarefied objects depends primarily on what
The materials that the object is made of
how do we determine the type of an atom (hydrogen, helium, gold, etc.)
The number of protons in the atom
which of the following aspects of a distant object can be learned by carefully analyzing the light we receive from that object
all of the above
how does an absorption spectrum differ from any emission spectrum
and emission spectrum displays light from excited gas molecules
light is emitted from an atom in the form of photons when
electrons fall to a lower energy level
because of their wavelengths there can only be a very small amount of energy and radio waves
false
when light has been read shifted that means it has
had its wavelength increase due to motion
if light from an object has been blueshifted what does that indicate about the object
it is moving towards us
what must be true of a photon in order for it to interact with the electrons of an Atom
it must have exactly the right amount of energy to take the electron to another energy level