Introducing radiant energy
Radiated energy refers to the sum of the electric field energy and magnetic field energy in electromagnetic waves, and is also called the energy of electromagnetic waves. Solar radiation hits the earth at the speed of light (c = 3 × 10 ^ 8 meters / second), and it has both the characteristics of particles and waves. In the physical geographic system, the reception and storage of radiant energy are inseparable from these characteristics. For example, green plants carry out photosynthesis, and the absorbed energy is carried out in the form of light quanta. Because of this quantum characteristic of radiant energy, the magnitude of quantum energy depends on wavelength and frequency.