Where does the enormous energy of solar radiation come from?

Solar energy refers to the photothermal, photoelectric and photochemical direct conversion of solar radiant energy.

The center of the sun has a high temperature and extremely high pressure of up to 15000000K. About 80% of the sun's mass is composed of hydrogen, and proton chain nuclear reactions will occur inside the high-temperature and high-pressure sun, releasing huge nuclear energy. And these nuclear energy radiate out in the form of electromagnetic waves (visible light that makes our world colorful is a kind of electromagnetic wave) and reach the earth. The radiation of the sun is very complex and consists of many wave bands, including ultraviolet, long-wave radiation, infrared and visible light and so on. Each band has its own characteristics, and they add up to form the total solar energy.

It can be seen that solar energy is the radiant energy released by the high-temperature nuclear fusion reaction inside the sun. To some extent, solar energy can be said to be inexhaustible, and the annual solar radiant energy reaching the earth's surface is about 130 trillion tons of standard coal, which is equivalent to the sum of all kinds of energy consumed by the whole world every year. 10,000 times.