What can spectra tell us about temperature?
Stars are too far away (and too hot!) for a human to touch, yet we can measure their temperatures. Spectra make this possible! Let’s investigate how.Stars Part 1: Spectra
Spectrum Tool. Using the Target Object menu, compare the spectrum of each star: Sun, M star, and B star. Adjust the wavelength slider so you can see their whole spectrum.
Spectrum Notebook. Answer the following questions in the Spectra of Stars section:
- At what wavelength does the Sun emit the most light? Hint: Where is the y-value roughly the highest?
- What is the energy associated with that wavelength? Use the measuring tool, first changing the wavelength unit to electron volts!
- Based on the brightness of light across the visible part of the spectrum, what color would you expect this type of star to appear?
Brightness 