SUMMARY
When atoms of an element are heated to a point where they emit light, it is found that they only emit characteristic frequencies of color. Demonstrations of H, He, and Ne are shown. Duration: 5:37
VIDEO CHECK QUESTIONS
4.12a How can a spectroscope help us identify elements?
4.12b If you are looking through a spectroscope at a diffraction gradient, and you see many red
4.12c How can astronomers use a spectroscope in their research of stars?
All video check questions can be downloaded from the EXTRAs menu.
