Global Technology and Application of Solar Exercise

How does solar energy work?Fusion graphic  better text

#1 The Sun

  • The sun is a big gas ball made up mostly of hydrogen and helium atoms.
  • Every second, the SUN radiates an enormous amount of energy out into space.
  • This energy comes from within its inner core in a process called nuclear fusion.

#2 Solar Energy Hits the Earth

  •  It take millions of years for the radiant energy in the suns core to make its way to the solar surface
  • It takes a little over eight minutes for the solar energy to travel to earth
  • The radiant energy travels to the earth at a speed of light, 186,000 miles per second. That’s 90 million miles in 8 minutes.

#3 The Energy is Absorbed by Photovoltaicscascade

  • The 51% of radiant energy that hits the earth can be used as a source of energy.
  • The energy can be captured using a photovoltaic cell.
  • Photovoltaics: comes from the words photo meaning light, and volts, which is a measurement of electricity.
  • Photovoltaic cells are also known as PV cells or solar cells.

#4 What a Solar Cell is Made of:

  • Solar cells are made of two thin pieces of silicon.
  • Each cell has a positive and a negative layer.
  • Positive-layer: is the piece of silicon that has a small amount of boron added to it, which gives it a tendency to attract electrons, hence has a positive tendency.
  • Negative-layer: is the piece of silicon that has a small amount of phosphorous added to it, giving it an excess of free solar-energy-in-indiaelectrons. This is why it has a tendency to give up electrons, a negative tendency.

#5 How the Solar Cells Make Electricity:

  • When the two pieces of silicon are placed together, some electrons form the n-layer flow to the p-layer and an electric field forms between the layers.
  • When the PV cell is placed in the sun, the radiant energy energizes the free electrons.
  • This movement causes energy which can be used as electricity. This happens silently and instantly.

#6 Watch and See these  cool Solar Innovations!

Solar Space Station

6 Solar Powered Machines85223-425x282-Important-solar-energy

Solar Powered Boat

Solar Roadways

Strange Solar Gadgets

Solar Trees in Israel

Solar Bike Paths

Solar Technology



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