Worksheet for Spectrographs

Names:  __________________________________________________________________

The job of your group is to investigate the spectra emitted by four sources: flourescent lights, an incandescent light bulb, a sample of excited gas, and the sky.

Obligatory Warning: Don't look at the Sun directly. Don't do it with your naked eye. Don't do it with the spectrographs. Point your spectrograph at the sky, 10 or 20 degrees away from the Sun.

Draw a picture of each spectrum in the boxes below. In the area to the right of each spectrum, describe what you saw and explain your picture.

Flourescent lights

Incandescent bulb

Excited gas -- can you identify it?

Daytime sky