quote:
I actually built a solar furnace for my inorganic chemistry final project using a 27 cm x 27 cm Fresnel lens (the kind used in overhead projectors). I focused the sunlight to about a 2 cm circle and put a thermocoupler connected to a Microlab system directly into the beam. The temperature went to 915 deg C (1680 deg F) in about 1 minute! By heating a steel ball bearing with the beam, I was able to calculate that the furnace produced about 20 Watts of power (~270 watts / sq meter). And this was end of April / early May, so the sun wasn't even at its peak then.
But it didn't even occur to me to try it at night.
Is it not a shame that our cretin friends are blatantly denied funding? I mean - if they were given a spaceship they could increase the body of knowledge on sun by flying close during the night
Even though I live in the country where cretins are a small minority, it is equally frustrating to encounter the same blatant lies week after week. It is as if they (the creationists) were coated with teflon - no amount of reasoning sticks.
™ Version 4.2
(1)
