I finally Got a fire started with a magnifying glass!

[lafinfil]

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 ...

[ztirffritz]

There's always this too:
http://www.solardeathray.com/

[microchip13]

Hmm, I'll have to try to get my hands on one at school.

[mikebw]

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.