Heating a swimming pool with Fresnel Lenses is possible but simply pointing one at clear water does nothing. A dark target is required to absorb the concentr... | From:GREENPOWERSCIENCE Views:11284 277ratings | |
Time:01:23 | More inScience & Technology |
Heating a swimming pool with Fresnel Lenses is possible but simply pointing one at clear water does nothing. A dark target is required to absorb the concentr... | From:GREENPOWERSCIENCE Views:11284 277ratings | |
Time:01:23 | More inScience & Technology |
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