The light that bathes the earth is a component of the broad spectrum of electromagnetic radiation from the sun, which propagates like waves. How these waves propagate depends on energy: the more energy a wave has, the shorter it will be.
Within the broad spectrum of electromagnetic radiation, only a small part is visible to our eyes - it is radiation whose wavelengths range from 380 to 760 nanometers. These narrow wavelength ranges of visible light correspond to the different colors that are observed when passing light through a prism, which causes the scattering (separation) of these different radiations.
Another important feature of light is its corpuscular nature, that is, light is characteristic for focusing on the form of corpuscles, known as photons. Photons are considered energy "packets" associated with each particle wavelength. Short wavelength light, such as violet light, has highly energetic photons. Long-wavelength light, such as red and orange, has low energetic photons. Thus each light radiation, each light wavelength, carries a certain energy. And the remarkable fact is that plants harness this energy for the production of organic matter in photosynthesis.
How can this be proved?
If a beam of white light passes through a prism decomposing into different colors, and each color we put a glass filled with water, sealed, and with a little plant inside, we will see over time that the plants subjected to red and blue radiation. show the highest degree of photosynthetic activity. This can be noticed by the size of the oxygen bubble that has formed in each glass.