Solar Power
through out history people have used the sun for drying clothes and food for thousands of years, but recently scientists have discovered a new use for the sun which is genrating power. the sun is hundred and fifty million kilometres away and amzingly powerful. Just the tiny fraction of the sun’s energy that hits the earth and that it self is enough energy arrives at the earth to meet our demands for a whole year- if only we could harness it properly.
However, in the U.k there are grants avilable to help you install solar power in your homes. Also there are three main ways that we use the sun’s energy and one is solar cells which in other words called photovoltaic and its job is to convert sun light directly into electricity. Normally in sunny climate, you can get enough power to run a 100 w light bulb from just one square metre of solar panel.
Life on earth, and of course all humann activity, depends on the availability of sufficient power to support that activity. Mary Archer tells us of some understanding of power and where this power comes from. Mary Archer is a british scientist who is specialised in the field of solar power conversion. She studied chemistry at St Anne’s college, Oxford and then physical chemistry at imperial college london, before becoming a lecturer at cambridge university. From 1988 to 2000 she was chairman of the national energy foundation, which promotes renewable energy. Archer examines and forecasts human power usage and supply. she goes on to talk about the future of sustainable power sources addressing the rate with which we consume fossil fuel resources and the alternatives that might supply the hundreds of exajoules we consume each year.
