What is solar energy?
- :)Lv 61 decade agoFavorite Answer
Solar energy is energy from the sun that we get most. It travels from the sun to the earth in rays. Some are light rays that we can see. Some rays we can’t see, like x-rays. We depend on solar energy and use solar energy in many ways.
Sunlight turns into heat when it hits things. Without the sun, we couldn’t live on the earth, because it would be too cold. We use the sun’s energy to heat water and dry clothes. Solar energy is renewable. The sun will keep making energy for millions of years.
Lots of people put solar collectors on their roofs. Solar collectors capture the sunlight and turn it into heat. People heat their houses and their water using the sun’s energy. Solar cells can turn light energy into electricity. Some toys and calculators use solar cells instead of batteries. Big solar cells can make enough electricity for a house. They are expensive, but they are good for houses far away from power lines.
Today, solar energy provides only a tiny bit of the electricity we use. In the future, it could be a major source of energy. Scientists are looking for new ways to capture and use solar energy.
Solar energy technologies use solar radiation for practical ends. Technologies that use secondary solar resources such as biomass, wind, waves and ocean thermal gradients can be included in a broader description of solar energy but only primary resource applications are discussed here. Because the performance of solar technologies varies widely between regions, solar technologies should be deployed in a way that carefully considers these variations.
Solar technologies such as photovoltaics and water heaters increase the supply of energy and may be characterized as supply side technologies. Technologies such as passive design and shading devices reduce the need for alternate resources and may be characterized as demand side. Optimizing the performance of solar technologies is often a matter of controlling the resource rather than simply maximizing its collection.
Thanks for the question^^Source(s): en.wikipedia.org
- Anonymous1 decade ago
Solar energy is energy from the Sun in the form of radiated heat and light. It drives the climate and weather and supports life on Earth. Solar energy technologies make controlled use of this energy resource. Solar power is a synonym of solar energy or refers specifically to the conversion of sunlight into electricity by photovoltaics, concentrating solar thermal devices or various experimental technologies.
In building design, thermal mass is used to conserve heat from the Sun, and daylighting techniques optimize light. Solar water heaters heat swimming pools and provide domestic hot water. In agriculture, greenhouses grow specialty crops and photovoltaic-powered pumps bring water to grazing animals. Evaporation ponds find applications in the commercial and industrial sectors where they are used to harvest salt and clean waste streams of contaminants.
Solar distillation and disinfection techniques produce potable water for millions of people worldwide. Family-scale solar cookers and larger solar kitchens concentrate sunlight for cooking, drying and pasteurization. More sophisticated concentrating technologies magnify the rays of the Sun for high temperature material testing, metal smelting and industrial chemical production. A range of prototype solar vehicles provide ground, air and sea transportation.