Talk:Burning glass

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Untitled[edit]

Is there any written sources or archelogogy excavations showing vikings had anything with this place to do, and that there was a viking harbor town? Is the word viking mentioned, or is this just a free speculation? Dan Koehl 11:50, 3 Dec 2004 (UTC)

science experiment[edit]

I really need help. At school were doing experments on myths we could try out. my group are doing an experiment to see if a magnifying glass can actually burn stuff. we tried four materials: wood bark, paper, plastic wrapper anf leaves. they work but i don't know why that happens, can somebody explain?

Pece Kocovski 02:25, 8 December 2005 (UTC)

I've tried this experiment before and it works you just need to get the right angle of the sun!!

Contradiction[edit]

This page appears to contradict itself, however I do not know the subject well enough to edit it properly.

Are you talking about the bit about archimedes? i've cleared that up. 121.6.110.166 04:26, 17 February 2007 (UTC)

Footage and Greek Navy[edit]

Actually there exists video footage from the greek navy + Ioannis Saka experiments about it, maybe someone can dig it up and ask for links to it?

Telescopes[edit]

If a person had access to one large parabolic mirror, I bet they had at least one smaller mirror. The geometry of a telescope allows to create a pencil of concentrated light that astronomers have used to light fires and break their equipment unintentionally. Ever been told that you need special filters to look at the sun? The density of the output power is related to the ratio of the larger to smaller focal lengths and the larger both mirrors are, the more light will be collected and transfered. It would be quite easy to design a method to allow safe and accurate targeting. Even better, since the light is concentrated into a beam, the energy drops off more linearly as the light passes through the air as opposed to the inverse square drop with the radial pattern from a single mirror system (even in a vacuum!). 129.107.28.119 (talk) 19:20, 16 July 2008 (UTC)

I suggest that a (link to) a scientific explanation of the burning glass is needed, for instance, is the burning achieved through concentrating UV light etc.. —Preceding unsigned comment added by 130.89.165.44 (talk) 19:09, 12 June 2010 (UTC)

Olympic torch and Vestal temple.[edit]

I remember that the flame of the temple of the Vestal virgins, as the Olympics torch, had to be lit only by the pure light of the sun. Because the fire had to be pure, not contaminated by a trigger. They used parabolic mirrors. This pure or "sacred" fire was used also to cauterize precisely the wounds in the hospital near the temple of the Vestal virgins. — Preceding unsigned comment added by 84.223.58.221 (talk) 18:08, 19 June 2011 (UTC) Sorry I see that it is into the article, so I only specified the religious motivation. — Preceding unsigned comment added by 84.223.58.221 (talk) 18:38, 19 June 2011 (UTC)