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Solar Energy

  • 22-12-2008 11:53am
    #1
    johnp23
    Registered Users, Registered Users 2 Posts: 168 ✭✭


    Hi this is my first post so sorry in advance if its in the wrong section.

    Im looking for a bit of information.


    1. i need to source a group of ten Magnifing glasses Starting at 5inchs down to 1 inch for an experiment i want to carry out.

    2. Does anyone have a formula for calculating the heat produced from a magnifying glass

    Thanks in adance


Comments

  • #2
    homer911
    Registered Users, Registered Users 2 Posts: 5,150 ✭✭✭homer911


    You might get a better response from the Physics or Popular Science forums


  • #3
    baldieman
    Closed Accounts Posts: 174 ✭✭baldieman


    the concentrated energy received through the glass or with a reflected mirror is the difference between the two area sizes. In other words, if the magnifying glass is 1sq M and the concentrated light is 1sq CM then the energy at the smaller end is a 100 times greater. There is no extra energy received any greater than the original surface area. Be careful with this, it can be dangerous!


  • #4
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 93,599 Mod ✭✭✭✭Capt'n Midnight


    aldi or lidl have a biggish magnifing glass for a few quid

    you could then make a cardboard mask with a hole in it for the other sizes


  • #5
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 93,599 Mod ✭✭✭✭Capt'n Midnight


    baldieman wrote: »
    In other words, if the magnifying glass is 1sq M and the concentrated light is 1sq CM then the energy at the smaller end is a 100 times greater.
    it's actually 10,000 times greater ;)
    they melt steel beams with the one in France


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