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As a comparison the moon and sun are roughly the same size in the sky from earth. The sun puts out about 1000 watts per square meter on a clear day at noon in s
by gnopgnip 8y ago
As a comparison the moon and sun are roughly the same size in the sky from earth. The sun puts out about 1000 watts per square meter on a clear day at noon in summer, the moon puts out about 0.0025 watts per square meter during full moon on a clear day, 1/400000 as much.
- btilly 8y agoYour figure for the energy from the Moon seems overstated. https://education.seattlepi.com/moonlight-strong-enough-power-solar-panels-4884.html https://education.seattlepi.com/moonlight-strong-enough-powe... quotes a ratio of 2.3 million to one. However the key point is this. The Moon is in reality 400 times smaller than the Sun. Which means that an optimally placed lens can actually make the image of the Moon 400 times smaller, for 160,000 times as little area. If the lens is big enough that this target area is mostly losing heat through black body radiation, again it should wind up over half the temperature of the surface of the Sun. Which is more than hot enough to start a fire.