Dividing Light into Spectrum

Principle purpose of this lecture is to present on Dividing Light into Spectrum. Most light sources contain energy in lots of different wavelengths. We can measure the brightness in various wavelength bands–the result is called the spectrum. The spectrum (total character of light emitted) can tell us a lot about a source.  Astronomers separate out light into its individual components using a diffraction grating or using a prism – then they analyze each part independently.