Solar Energy Definitions

Posted by John Sommers on 5th May 2019 in General

The Sun The Sun is the closest star to our planet, is a dwarf-type star, with a diameter of 690 000 km and a mass equal to 300,000 planets like ours, the mean distance from the Sun to Earth is called the astronomical unit and has a value of 1.5 X 10 to 11 m. Solar energy comes from nuclear fusion reactions that take place at its core, where hydrogen atoms combine together to form helium atoms, hydrogen atoms combine with atoms to form helium atoms lithium, etc. . while a small part of the mass of the atoms is converted into energy according to Einstein's equation E = mc2. In the solar core is estimated that the temperature is about 10 to 7 degrees Kelvin and is where generates 90% of the energy that flows into the solar surface. The sun radiates its energy in the form of electromagnetic waves with a wide range of wavelengths, which move in space at a speed of 300,000 miles per second, or speed of light. The sun radiates each second amount of energy a 4 X 10 to 26 Joules which generates an output of 4 X 10 to 23 Kw, to give us an idea of the enormous amount of energy that this represents, suffice to say that the global consumption of energy in a year is estimated at 3.25 x 10 20 Joules or 3.25 X10 power 17 kW, this means that in a second the sun produces more energy than is consumed in a year worldwide. .

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