Sources

Picture 1

Slide 1

Picture 2

http://etc.usf.edu/ClipArt/36000/36046/spectroscope_36046.htm

http://www.wisegeek.org/what-is-a-spectroscope.htm#

http://amazing-space.stsci.edu/resources/explorations/groundup/lesson/basics/g23/

Slide 2

https://solarsystem.nasa.gov/deepimpact/science/spectroscopy.cfm