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+--- Thread: I finally Got a fire started with a magnifying glass! (/showthread.php?tid=6343)
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Re: I finally Got a fire started with a magnifying glass! - lafinfil - 03-06-2006
microchip13 Wrote:
-------------------------------------------------------
> What exactly is a Fresnel Lense?
>
It is a lens designed to gather and concentrate light from the collected source - i.e.
overhead projector as stated
stage lights / focusing spot light
lighthouse - one of the first uses
focusing screens on camera
etc ...
Re: I finally Got a fire started with a magnifying glass! - ztirffritz - 03-06-2006
There's always this too:
http://www.solardeathray.com/
Re: I finally Got a fire started with a magnifying glass! - microchip13 - 03-06-2006
Hmm, I'll have to try to get my hands on one at school.
Re: I finally Got a fire started with a magnifying glass! - mikebw - 03-06-2006
That solar death ray site is pretty funny. If I had nothing else to do I might just build one of those for myself, although on second thought I would probably end up killing some living animal by accident, so scratch that.