Astro October 17th 2013.
Energy and Mtion
If we hit the gas the gas gets more energy the particles are moving
faster when electrons are moving faster they go to an excited state.
if we continue giving energy to the atoms search up
she's going fast…
what is the energy of the emitted photon? Clciker quiz
B. smaller than
c. THE SAME AS THE ABSORPTION
Clicker quiz 2min
how many absorption lines would we see in the spectrum if we had
many atoms with the energy levels as seen below and many photons
with different energies?
correct answer is D.
What if there is a line in a different position?
what if i had that line there
Clicker quiz.Why is there a line at a different position while all the
other lines remain the same?
A. because new energy levels are created b.Because there is another chemical element in the gas
c. because the new line is an emission line
The answer is B.
we have sodium it be two different lines neon has a ton of lines the
orange and red.
the beauty of this the spectra of chemical elements is like you're
fingerprints, all of you has a set of finger prints that is different from
every other finger print, atoms have same particular thing we don't
know what gas out of this room is made of, or out of a star that is very
very far away, in fact some of the things we have learned fmor earth
we've learned far from stars.
they give this line this name helium, greek word for sun is helios
helium was discovered on the sun before it was discovered on earth.
years laater they combine elements to make helium.
Our atmosphere also aborbs light
our atmosphere ale…
we have different waves lengths gamma ray x ray ultraviolet visible
life as we know it is allowed we have this very thin layer of atmosphere
safest from x rays gamma ultra violet and the sun, the atmosphere
Light as we know it is this tiny fraction that only info are eyes can
process, as you see theres so much more.
The Doppler Effect
This is the story of a little bug in the middle of a pond
this bug s moving it legs when bug moves it legs, it starts emitting
waves you throw a pebble into pond you create all this where is the
same, little bug moves legs stay there waves outspending where he is expanding, the difference between the crest of one wave and other one
is different the frequency from both sides is the same.
what we see if we look from my side i see one wave coming then
another one does he see the same thing, yes its exactly the same
distance wave length and frequency
Now, Let's imagine the bud decides to move towards one sides
Hes emitting legs and centre of wave changes now he moving picture
moving more to the right
doctor reid and i don't see the same thing
i see frequency of the wave is more f