What are photosynthetically active radiations?

Photosynthetically Active Radiation (PAR):

1. The light absorbed by plants for photosynthesis is known as photosynthetically active radiation or PAR.
2. The wavelength spectral range of solar energy that is absorbed by plants during photosynthesis.
3. The visible solar energy spectrum, which spans the wavelengths 400 nm to 700 nm and is visible to the unaided eye, includes the PAR range.
4. The quantity of PAR wavelength absorbed varies based on the time of day and the altitude at which the plant is growing, despite lying in a defined spectral range.
5. Long-wavelength, lower-energy photons are found beyond the other end of the PAR wavelength.
6. They do not have sufficient energy to support the photosynthesis reaction.
7. Plants have evolved to use a specific range of solar light between 400 and 700 nanometers (nm) as photosynthetically active radiation (PAR), which gives off enough energy without endangering the plant.