Please visit the websites listed below to inform our discussions of the effects of color filters on the light available to the seedlings.

Single filter emission tool. Set the lamp light to 1.0 for Red, Blue and Green, then observe what color light passes through the filter.

Electromagnetic spectrum - colors of visible light and corresponding wavelengths, in nm

Absorption spectra of chlorophyll a and chlorophyll b. What colors correspond to the wavelengths at which chlorophyll a and b exhibit peak absorption?

Last modified: Monday, December 19, 2011, 9:18 AM