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Uses of solar energy
Solar energy refers to the radiant light and heat from the sun. The sun is the main source of energy on the earth. Sun rays transfer energy from the sun to the earth’s surface through a process called radiation.
This energy can be harnessed using technologies such as solar heating, thermal energy and photovoltaics (conversion of light into electricity).
Uses of solar energy
Solar energy is used in the following ways:
(i) Drying clothes, grains, fruits and meat.
(ii) It is the source of heat and light which are essential for seed germination.
(iii) Plants use energy from the sun to manufacture their own food through the process known as photosynthesis.
In this process, green plants and certain other organisms convert light energy into chemical energy that can later be released to provide energy for the organism’s activities.
(iv) Human bodies absorb solar energy and convert it into Vitamin D which is useful for human health.
(v) Solar energy is important in the formation of rainfall. It evaporates water from water bodies which rises, cools and condenses to form clouds and eventually rainfall.
(vi) Solar energy is an alternative source of energy to fossil fuels that are harmful to the environment. It is also an alternative to hydroelectric power (HEP) that is not reliable and requires a lot of money to produce.
(vii) Solar energy can be used for domestic and industrial purposes.
In Tanzania, solar energy is increasingly being used as a source of electricity. particularly in areas with no access to other sources of energy. In the United States of America (USA), China and Japan, solar energy is used for cooking, lighting and heating.
For example, solar ovens and solar cookers are used for heating and cooking.