Name: ________________________ DUE 10/18 ID number: ________________________

Homework 8. Spectral Lines

Use the diffraction grating handed out in class (10/13) to look at spectra of several different light sources, including an ordinary light bulb, a neon sign, a streetlight, and two more of your own chosing. Which of these sources produce a continuous spectrum, which produce bright spectral lines, and which produce both? Give your answers below, and sketch the spectrum for each.

Light Source Lines or Continuous? Sketch of Spectrum
Light Bulb ________________
Neon Sign ________________
Streetlight ________________
____________ ________________
____________ ________________

Joshua E. Barnes (
Last modified: October 12, 1999