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What am I?

I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty. What am I?

Correct answers: 46

The first user who solved this task is On On Lunarbasil.

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I came home & my dog peed a li...

I came home & my dog peed a little because he was happy to see me. None of my friends pee when they see me. I am surrounded by fakes.

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Macedonio Melloni

Died 11 Aug 1854 at age 56 (born 11 Apr 1798).Italian physicist who was the firstto extensively research infrared radiation. Sir William Frederick Herschel discovered infrared radiation in 1800, but research stalled until the invention of a thermopile in 1830. That instrument was a series of strips of two different metals that produced electric current when one end was heated. Melloni improved the thermopile and used it to detect infrared radiation. In 1846, from an observation point high on Mount Vesuvius, he measured the slight heating effect of moonlight. He showed also that rock salt, being transparent to infrared, made suitable lenses and prisms to demonstrate the reflection, refraction, polarization and interference of infrared in the same manner as visible light.

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