Solar energy is available all over the world, but the development has just begun. Recently, people began to use solar energy to directly utilize the energy of the sun. However, indirect solar energy is used. By looking at the two, you can see the difference.

          When a solar cell receives sunlight to generate electricity, it is direct solar energy. Sunlight can only be converted between solar energy and electricity once. Fiber optic cables are a source of solar energy. It can be installed outdoors so that the energy absorbed from the sun can be converted into light inside the building.

          Indirect solar energy has existed for thousands of years. Solar energy has undergone many changes and has become a usable energy source. It can be regarded as the result of the sun's natural influence on the world. Humans can use energy, but the energy of the sun is concentrated on humans. 

          Plants convert light energy into chemical energy through photosynthesis. This is the first conversion. Then, for example, you can use tree branches to generate heat in the fire. Plants can be converted into biofuels to generate electricity.