What is Light?
Light is energy traveling in waves. The size of light's wavelength determines the amount of energy the light can provide and what color the light will appear.
The smaller the wavelength, then the more energy present! Wavelengths of specific colors:
Violet: 380 – 440nm Blue: 440 – 500nm Green: 500 – 550nm Yellow: 550 – 630 nm Orange: 630 – 670 nm Red: 670 – 700 nm |
Why are plants green?
Plant's chloroplast contains pigments. Pigments are molecules responsible for absorbing light for photosynthesis. Different plants contain different pigments, but the most common pigment is chlorophyll. There are several different kinds of chlorophyll plants use. Most plants contain a large amount of chlorophyll A because chlorophyll A is the main pigment involved in photosynthesis. Chlorophyll A absorbs blue, violet, and red wavelengths of light, but reflects green wavelengths of light. Most plants appear green because all the chorophylls are reflecting green wavelengths of light.