Uploader Comments (GREENPOWERSCIENCE)
Top Comments
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@souleeze Cooking, sterilizing things, distilled water, steam production, soldering, metal melting and casting, Zinc, copper, lead, fiber optic light collection, Stirling Engine fuel source, Bio fuel heating,
last resort local wound infection treatment DO NOT ATTEMPT, only if NO other options EX: stranded no help, toe turning black. Always have antibiotics in your kit, they are cheap.
All Comments (111)
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how to make one ??
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Wow!
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is it difficult to focus 2 or more lenses on the same point?
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how much does 1 cost and what is the max temp u can get in the best day ?
where did u buy it?
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How do fresnel lenses compare to parabolic cookers in terms of efficiency? They seem to be more powerful, maybe because more sunlight goes through plastic than is reflected from the metal. What size fresnel lense would you need to get same power as scheffler solar cooker?
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love the work here
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you have some great stuff here
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sorry for the bad english, if you make a beam from your lenses to shine on solar panels will they burn the glass?
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was wondering if u can tried to use the lense to power up solar panels by not burning the glass
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some really good stuff here
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@GREENPOWERSCIENCE hey Dan, just wondering if you sell the Fresnel lens film, or where i could buy some like online or a store. thanks!
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Have you attempted to set smaller/larger lens' in an array?
You guys really rock btw : )
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okay do i get these out of projection tvs cuz im gonna go tv hunting on craigs list
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When I heard thewire zapping I thought he had hit a wire with the lens, until I saw the bottom of the screen.
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fudge packer
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Dan, are you selling any of the lens? I would be interested in buying some.
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if you were to do that with a millian candle power flashlight you will burn your hands with that lens of yours making a you tube of it soon
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Are Fresnel lenses Made of glass or a type of plastic?
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were do you get your Fresnel lenses at
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'It allows the majority of sunlight to enter the lens and focus on the target'. - WOW, REALLY? You mean like every other lens that has ever been made in the history of life on earth? Amazing! Whatever next, water that is wet?
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Does "working on" mean GREENPOWERSCIENCE is the manufacturer of new lenses?
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You need to get some cheap gas welding goggles so you don't end up blinding yourself with the reflections
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Imagine building an entire roof from one, it'd open a portal to another domain at the epicentre of the loft when the sun passed over head.
Can you increase the focal point intensity even more by stacking? Can many fresnel lense be positioned at distances that would concentrate the light even more? Like stacking them one in front of the other. Would this cause damage to the second or third lense spaced in series? Thanks for sharing.
jab0805 1 year ago 4
@jab0805 Hi,
Additional lenses only shorten the focal length by half, the second lens dramatically absorbs the sunlight into the lens acrylic because the angles are different. The Second lens drops the overall throughput by 30% the focal point diameter is a bit smaller but much weaker.
If you stack 4 lenses your focal length drops to about 3 inches and it barely burns paper, thank you for the good question and for enjoying our videos:-)
GREENPOWERSCIENCE 1 year ago 6