Page 3, LIGHT & ASTRONOMY: [Previous Page] [Next Page] [Class Home Page] Text Pages 61-63

The Electromagnetic Spectrum

    The Entire Electromagnetic Spectrum is defined by the wavelength of the light (which is the same as saying the frequency). For instance, RED light has a longer wavelength than BLUE light. When it passes through a prism, it breaks up the light into its individual components, based on the wavelength.

    However, the OPTICAL represents only a very, very small portion of the entire Electromagnetic Spectrum, which is shown in its entirety below: