Due to resources are becoming more scarce and traditional ways of supplying electrical power and heat are becoming more costly a lot of people seem to be looking into alternative sources of power. Probably the first one which comes to mind for many people is solar power. Solar power is harnessing the energy put off by the sun's rays to provide electrical power and heat.
Albeit not many people understand the concept, use of solar energy is widely known in many parts of the earth. Energy from the sun has been employed for centuries now, both knowingly and unknowingly. One of the initial examples when solar power was utilized was back in the 1800's when explorers collected heat from the rays of the sun by using a box and used it to cook food. Solar power normally entails collecting light and heat from the sun's rays and using it both in homes and in places of work for a multitude of uses. According to researchers, a very small percentage of the total energy falling upon the earth from the sun is actually being harnessed. This has been attributed to the fact that some people do not have the technology required to fully collect energy while other people, especially in developed countries, do not feel the need to collect energy from the sun when they have other sources of power.
These days solar energy is harnessed in several ways including photovoltaics, heat engines and hot water collection. These technologies can either be passive or active technologies based mostly on the way they utilize and convert the power. Photovoltaic devices and solar cells are known to convert the energy into electricity and can be used to power watches and calculators. Photovoltaic panels and other manufactured solar energy collectors are normally classified as the active harnessing technologies while passive technologies involve using building materials that make it easier for energy to be collected from the sun. They include materials that allow dispersion of light as well as designs that make it possible for light to fill a room or an office.
Plentiful solar energy can be utilized in a wide number of ways by people across the globe. Of these, lighting is the most typical use. Incorporating skylights and windows when constructing, reduces the amount of electric illumination required in that building. Using solar water heating units or additional types of heaters to warm up rooms or heat water is another widespread application of solar energy. People sometimes use solar heating units to warm up swimming pools. Active solar harnessing technologies normally include the use of solar panels to convert heat coming from the sun into electrical power. However, the use of solar energy is slowed down by the fact that the rays from the sun only reach the earth at certain times of the day and is based on location, season and weather conditions. This means that people have to collect the all the power that they require in the period when the sun's rays reach the planet.
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