1. The Orion Nebula, M-42, is a hot, thin cloud of glowing gas so its spectrum is:
a. a few bright lines against a dark background
b. a few dark lines in the continuum
c. a continuum, but with both bright and dark lines mixed in
d. a continuum, strongest in the color red.
e. not in the visible portion of the spectrum

2. why are molecular lines more complex than elemental spectral lines?
a. molecules are the basis of life.
b. molecules are heavier than atoms.
c. molecules can vibrate and rotate as well
d. molecules have two or more atoms.
e. most of the universe is made of molecules, not individual atoms

3. True / False: Spectroscopy of a star can reveal its temperature, composition, and line-of-sight motion.

4. The observed spectral lines of a star are all shifted towards the red end of the spectrum. Which statement is true?
a. the star is not rotating.
b. this is an example of the photoelectric effect
c. the star has a radial velocity away from us
d. the second law of Kirchhoff explains this.
e. the star has a radial velocity towards us

5. An incandescent light (glowing tungsten filament) produces:
a. a continuous spectrum, with the peak giving the temperature of the filament.
b. a continuum, with dark lines of tungsten and argon as well.
c. an emission spectrum, with bright lines due to ionized tungsten
d. a continuum, with bright tungsten lines added
e. an absorption spectrum, with dark lines due to the solid filament

6. Emission lines of hydrogen that are found in the ultraviolet part of the electromagnetic spectrum are formed by electrons transitioning from
a. level 2 to any level
b. any level to level 3
c. level 1 to any level
d. and level to level 2
e. any level to level 1

7. the Fraunhofer lines in the solar spectrum are actually:
a. zeeman lines around sunspots due to their strong magnetic fields
b. emission lines from hot gases in the chromosphere of the Sun.
c. emission sections of the continuous spectrum of the photosphere.
d. red shifted lines due to the Sun's rotation
e. absorption lines due to the thin outer layer above the photosphere.

8. True/ False: the fred hydrogen alpha line carries more energy per photon than the blue-green hydrogen beta line does.

9. True/ False: the absorption lines for a cool thin gas are identical in color and energy to the emission lines of the same gas if hot enough to glow.

Hmmmm.

What if you give us what you think are the answers to these (with an explanation as to why) and we can discuss that. I don't think us simply answering your homework questions for you is likely to be an effective way to get the knowledge ensconced into your brain...

__________________
"I'd take the awe of understanding over the awe of ignorance any day." - Douglas Adams

"Certainly, in the topsy-turvy world of heavy rock, having a good solid piece of wood in your hand is often useful." - Ian Faith

I'd be glad to answer all of your copied and pasted questions

I can't guarantee their accuracy....

Pete

__________________
PJE

There's so much I don't know about astrophysics. I wish I had read that book by that wheelchair guy.

I'd just like to point out that while the Fred hydrogen alpha line was certainly energetic, the Ginger hydrogen beta line was equally energetic, but had to do it backwards and wearing high heels.

(It's a slow Wednesday here...)

__________________
"I'd take the awe of understanding over the awe of ignorance any day." - Douglas Adams

"Certainly, in the topsy-turvy world of heavy rock, having a good solid piece of wood in your hand is often useful." - Ian Faith

These are ten of the thirty problem packets. It is difficult.

Refer post #2.

__________________
"I'd take the awe of understanding over the awe of ignorance any day." - Douglas Adams

"Certainly, in the topsy-turvy world of heavy rock, having a good solid piece of wood in your hand is often useful." - Ian Faith

Yes, a million times over. Don't think we should be doing anyone's homework.

I was interested to discover that both Astronomy 202 of Case Western and AST 1002 of Florida State have online pages which include some of these same questions (without answers, of course) with exactly the same wordings although they claim to use different textbooks. This makes me curious about the source of these quizzes. Do the textbook authors crib from one another or is there another common source?