astronomy 100 starlight, starbright. star light, star bright first star i see tonight i wish i may,...
TRANSCRIPT
Astronomy 100
Starlight, Starbright
Star light, star brightFirst star I see tonight
I wish I may, I wish I mightHave the wish I wish tonight
• ANSWER NOW: (You will turn this in) Write, discuss, sketch, label – somehow communicate your knowledge and understanding of the electromagnetic spectrum. If you don’t think you have one, write/discuss/sketch/label a rainbow instead. Tell me everything you can.
• 1st GOAL: Understand spectra.– Vocabulary: wavelength, spectra, continuous spectrum,
emission spectrum, absorption spectrum, black-body spectrum, electron, energy levels, excited, Doppler effect, red shift, blue shift, metallicity
Antonine-education.co.uk
• Different wavelengths are different colors.• Different wavelengths are different energies.• Different colors are different energies.
• If you look directly at a heat source – you get ALL POSSIBLE COLORS – continuous spectrum or “black body” spectrum.
• If you look at a heated gas you get some colors because it’s not heat, it’s excited electrons.
Continuous Spectrum (Heat)
• http://an.hitchcock.org/repairfaq/sam/spctrm3.jpg
Physics.uiowa.edu
upei.ca
Spectra Activity
physics.umd.edu
http://physics.uoregon.edu
Classification Activity
OBAFGKM Spectra
KPNO .9m Telescope, AURA, NOAO, NSF
Solar Spectrum
odin.physastro.mnsu.edu
• http://www.youtube.com/watch?v=imoxDcn2Sgo
• http://www.youtube.com/watch?v=J43lAESftPs
• http://www.youtube.com/watch?v=-t63xYSgmKE
• Review: (You will turn this in)• Define three of these terms:
– Metallicity– Spectrum– Excited– Spectra– Doppler effect– Red shift