Spectra From Space
2. The earth's atmosphere allows what wavelengths to pass through?
3. A good infrared radiator is:
4. Infrared radiation is produced by:
5. The human eye is sensitive to:
6. Describe briefly what a spectroscope does:
A spectroscope is a device for spreading out light so that different wavelengths form a linear band, making a spectrum that can be seen or measured.
7. What can scientists learn by using a spectroscope to look at light from a star?
Scientists can see what kinds of light the star produces, and how much at each wavelength. From this, they can tell the star's age and temperature, and some of the elements in its outer layers. Scientists can also look at light coming from clouds of gas, or in the sky's "background". Gas clouds are often regions where stars are forming, and the microwave background has helped confirm the idea that the universe has been expanding since the big bang.
1. Would you like to learn more about spectra and satellites?
2. What was one thing you learned that you didn't know before?
3. Would you like to learn more about Earth and Space Science?
4. Did you tell anyone outside the class about the internet lesson? Who? What did you say?