a) chlorophyll absorbs predominately blue and orange-red light
b) green-yellow is transmitted and reflected
responses - due to effect on photosynthesis
germination in light requiring seeds
Some seeds will only germinate in the light, therefore sow on surface to see sunlight.
a) sunlight and any white or red light causes germination; (causes Pfr form to be present)
b) far red light inhibits germination (causes Pr form to be present)
OF THE "ATMOSPHERIC WINDOW"
The 400 to 700 nm wavelength band of radiation (visible light) from the sun passes through the atmosphere relatively unaffected before reaching the earth's surface, whereas other wavelengths (especially UV and IR) are absorbed, reflected or scattered by the atmosphere.