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10 Cool Facts about Light

1) Greeks thought our sight came from something dashing out of the eyes and into objects. 2) The first determination of “c”, the speed of light in a vacuum, was made by a Danish astronomer using the...

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The Speed of Light

The first determination was made by a Danish physicist using delays in the transit of Jupiter’s moons. The vacuum in which the light traveled was interplanetary space. In those conditions you have,...

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Two Yahoo Experiments

You may not know this but yahoos appeared the first time in Gulliver’s Travels as savages with a fancy for shiny things. Today they are mainstream, and like all sorts of people, some do research and...

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Meaning and Perception

[Written in 1998. From private records.] Atoms and molecules combine chemically and the Universe could have been a dead place with only Physics and Chemistry doing their relentless work in worlds with...

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