<em>When it reaches the Earth, some is reflected back to space by clouds, some is absorbed by the atmosphere, and some is absorbed at the </em><u><em>Earth's surface.</em></u><em> However, since the Earth is much cooler than the Sun, its radiating energy is much weaker infrared energy.</em>
Power is a function of voltage times the volume of electrons (current). Power is the ability to do work and is measured in Watts. The higher the voltage the more power you have with the same current.
