• Question: How do we get more energy from the sun

    Asked by chimp 123 to Angela, Claire, Ian, Robert, Sarah on 19 Nov 2014.
    • Photo: Angela Stokes

      Angela Stokes answered on 19 Nov 2014:


      Solar energy travels from the sun to the earth in rays. Some are light rays that we can see. Some are rays we can’t see, like x-rays. Energy in rays is called radiant energy.

      Lots of people put solar panels on their roofs which capture the energy from the sun and turn it into heat.
      Photovoltaic (PV) cells turn the sun’s energy into electricity. Photo means light and volt is a measure of electricity. PV cells are made of two pieces of silicon, the main ingredient in sand. Each piece of silicon has a different chemical added. When radiant energy hits the PV cell, the layers of silicon work together to change the radiant energy into electricity.

      So perhaps having more PV panels would help us use more of the suns energy?

    • Photo: Robert Bowles

      Robert Bowles answered on 19 Nov 2014:


      Chemists are working on improving photovoltaic cells to make them more efficient and harness more energy by coming up with new materials to use in them. More info here:
      http://www.rsc.org/campaigning-outreach/global-challenges/energy/

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