Newton showed that white light is composed of all the colors of the 
rainbow. 
This tool from the Light and Spectroscopy tutorial. 
This tool from the Light and Spectroscopy tutorial. 
Note that students may not be familiar with the notation concerning ions, 
especially
 since the book does it slightly differently in the text than it does in this 
figure, (i.e. +2
 vs. ++) so this may need to be explained.
You can use this slide as an example of real astronomical spectra made 
from a combination
 of the idealized types. Here we have the continuous (thermal) spectrum 
from the solar
 interior; dark absorption lines where the cooler solar atmosphere 
(photosphere)
 absorbs specific wavelengths of light. 
 
Remind students that the intensity is per area; larger objects can emit 
more total
 light even if they are cooler. 
 
Remind students that the intensity is per area; larger objects can emit 
more total light even if they are cooler. 
 
Remind students that the intensity is per area; larger objects can emit 
more total
 light even if they are cooler. 
 
Remind students that the intensity is per area; larger objects can emit 
more total
 light even if they are cooler. 
 
Remind students that the intensity is per area; larger objects can emit 
more total light even if they are cooler. 
 
This figure from the book can give an introduction to the Doppler effect. 
This and the following slides are tools  from the Doppler Effect tutorial. 
