These ultracapacitors have a massively increased power density compared with conventional capacitors and this bank stores 50 kJ.
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This is a spark detector for alpha particles from an Americium sample. It runs on 6 kV via a 400 k ohm resistor and a 100 pF capacitor and has about 0.2 inches between wires and is about 0.2 inches deep.
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This is an updating graph of background radiation in my home town in Western Australia. It is updated 6 hourly. It runs whenever I have my Geiger counter on. Typically the background is about 60 counts per minute (CPM).
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A group of 9 prisms allows a circular light path and gives multiple internal reflections.
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A magnet levitating, “pinned” above a 1 inch disk of Yttrium, Barium and Copper superconductor in a pool of liquid Nitrogen at -196C. This is the “Meissner” effect.
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Coin shrinking a Japanese coin to half its diameter while preserving details. Bonsai for coins. You can still see the Japanese characters miniaturized on this one yen coin. “Continue reading” for the details of the huge currents involved to make small change. Continue reading
This crack that separates the can in two was formed in 30 microseconds. How was it done?
ps Ninjas were not involved.
Mystery photos 116 in the series.
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Blu-ray laser fluorescence in 3 different fluids showing different colours. What are they?
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How many lasers were used to make this photo? What is going on?
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A 100 W LED has enough power to burn stuff. And this is “cold” light with no infra red at all.
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