Astronomy Test 2 Lecture Tutorials

Stars of the same spectral type have the same...

Temperature

There are dark lines in the absorption spectrum that represent missing light. What happened to this light that is missing in the absorption line spectrum?

The photon lost its color from being absorbed in a cool low density cloud

If a star existed that was only a hot, dense core and did NOT have a low-density atmosphere surrounding it, what type of spectrum would you expect this particular star to give off?

continuous spectrum

Stars of the same absolute magnitude number have the same...

luminosity

Stars like our sun have low-density gaseous atmospheres surrounding their hot dense cores. If you were looking at the spectra of light coming from a star which of the three types of spectrum would we observe? Explain

Absorption because light goes through low density cloud before being observed

What type of spectrum is produced when the light emitted directly from a hot dense object passes through a prism?

Continuous spectrum

What type of spectrum is produced when the light is emitted directly from a hot low-density cloud of gas passes through a prism?

Emission spectrum

You are looking at a brightly lit full moon illuminated by reflected light from the sun.

I think the moonlight is only reflected sunlight so we will see the sun's absorption line spectrum

Describe the source of light and the path the light must take to produce an absorption spectrum

It must begin with a hot dense energy source pass through a cool low density cloud and then through a prism