Lecture 3 Flashcards
(17 cards)
what is the lyman series?
E(n) to E(n=1)
what is the balmer series?
what is special about it?
E(n) to (En=2)
only series that produces visible light
what is the paschen series?
E(n) to E(n=3)
what is the brackett series?
E(n) to E(n=4)
compare the bohr model vs the dirac model
bohr: only level “n” matters for E transitions (eg. all n=3 electrons have the same E)
dirac: electrons in diff orbitals, but the same n have slightly diff energies
light emission/absorption is caused by what?
changing E levels
in the emission spectrum, what do the colored lines mean?
it is the E wavelengths that correspond to which gases are released/emitted from the source
in the absorption spectrum, what do the black lines mean?
it is the E wavelengths that correspond to which gasses are absorbed from the source
all objects emit electromagnetic E b/c of what?
motion of their atoms = heat
results in thermal radiation
the amount of radiation at each wavelength depends on what?
temp of the object
how does temperature affect light absorption?
higher temp has peak intensity at shorter wavelengths
what is the zenith?
point directly overhead
what is the meridian?
circle through the zenith connecting the north and south poles
what is the celestial equator?
projection of the earth’s equator onto the celestial sphere
what is declination?
analogy of latitude (for the celestial sphere)
what is right ascension (RA)?
how is it affected by earth rotation?
analogy of longitude (for the celestial sphere)
it constantly changes as earth rotates
what is the ecliptic?
path the Sun follows as it appears to circle
around the celestial sphere once each year.
It crosses the celestial
equator at a 231° angle, because that is the tilt of Earth’s axis.
