Now this is HOT. A high quality Fresnel lens melts brick.
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Fresnel lens
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Tag Archives: ebay
Under an Atomic bomb – Trinitite
Trinitite is glassified soil from the Trinity site of the first atomic blast in 1945. 67 years later it is only mildly radioactive. The site is now covered and new samples are not able to be collected. Nevertheless it was only a few dollars on eBay for this 1.83 g sample. This sample is seen over the port of my pancake Geiger counter.
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100 Watt LED
This is a hugely powerful LED made from a 100 x 1 W LEDs. To paraphrase Crocodile Dundee: “That’s not a LED, THIS is a LED!” “Continue reading” for more details and photos.
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One Watt White LED
One mother of a bright LED (in 2004). This LED (Luxeon Star) is 180,000 mcd and draws 1 watt (350 mA at 3.4 V) and was claimed to be the worlds brightest series of LEDs in 2003.
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Tritium
Tritium tubes have radioactive tritium gas and a phosphor which glows constantly. Tritium is hydrogen with two neutrons. It is radioactive with a half life of 12.3 years.
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SSY1 laser
The SSY1 laser was used as a range-finder laser on an M1 tank as I understand.
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Blu-ray Violet Laser
A Blu-ray violet laser is made up into a hand held unit.
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