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Solar energy heat energy light energy

  1. Feb 23, 2006 #1
    solar energy heat energy light energy......

    i am a student in high school. and i want to ask someone about the basics of
    solar energy. i want to create a solar system that can heat up water. anyof you can give some advices/ equation/model/ for my idea.
    is ther possible if a solar cells can run a motor? and is it possible that a solar energy can be gather to create a fusion reaction (if possible)?
    can sombody give me the explaination for the following situation?
    " i use a magnify glass to gather the sun light onto a paper. after a few minutes the paper burn up." how can magnifying glass do that?
    some body can give me a system equation for the following situation?
    " i let the sun ligh (concentrated) go through a transparent contaner which containing pure water. i notice that the temperature of the water is being raised up." i wonder why?:surprised
    these question is really basics for all designer in here. can you give some informations about these "old stuff"?
  2. jcsd
  3. Feb 23, 2006 #2


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    Staff: Mentor

    Could you start by saying what you think is happening here? We don't just answer homework questions for people here - we help students answer them themselves.
  4. Oct 24, 2008 #3
    Re: solar energy heat energy light energy......

    The energy we receive from the sun at mean earth distance is called solar constant (SC) SC=1353 watt/M^2 that is 13,53 watt /dm^2. A lens makes a dot of the sun in mm^2. If you want to calculate the intensity of the light in the dot you need to divide the surface of the lens bij the surface of the dot. for example 2cm^2/(2mm^2) = 100.
    The intensity of the sunlight on the lense is 13,53*2/100 is 0,27 watt.
    If the lense is 100% you get 0,27 watt / (2mm^2)
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