What is solar energy for class 4

What is solar energy?

Solar energy is defined as the transformation of energy that is present in the sun and is one of the renewable energies. Once the sunlight passes through the earth’s atmosphere, most of it is in the form of visible light and infrared radiation. Plants use it to convert into sugar and starches; this conversion process is known as photosynthesis.

What is solar energy used for?

Solar energy is light, heat, and other forms of energy given off by the Sun. Solar energy can be collected and used to heat buildings and to make electricity. Most solar heating systems capture solar energy with a device called a flat-plate collector. The collector is a large plate of black metal covered with a sheet of glass.

What are the different types of solar energy?

There are two types: active solar energy and passive solar energy. Active solar energy uses special technology to capture the sun's rays. The two types are photovoltaic cells (PV cells or solar cells) and mirrors. They focus sunlight in a specific spot to generate electricity. PV cells last for a long time and are efficient.

Why is solar energy a non-renewable source?

Solar Energy has an inexhaustible supply and it is non-polluting as in the non-renewable sources like coal, natural gas, and petroleum. There is a particular process of producing electricity from Solar Energy. To generate Solar electricity, photovoltaic cells are used.

What is active solar energy?

Active solar energy uses mechanical devices to collect, store, and distribute energy. Solar thermal energy: This energy is obtained by converting solar energy into heat. Photovoltaic solar power is the energy obtained by converting solar energy into electricity.

Is solar energy free?

Earth receives 200,000 times of the world's total daily electric generating capacity in the form of Solar Energy. Although Solar Energy is free, the huge costs of its collection, conversion, and storage of Energy make it difficult to use properly. Solar radiation can also be converted into thermal Energy or electrical Energy.