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Sarah Keene
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Armand-Hippolyte-Louis FizeauDied 18 Sep 1896 at age 76 (born 23 Sep 1819). French physicist who was the first to measure the speed of light successfully without using astronomical calculations (1849). Fizeau sent a narrow beam of light between gear teeth on the edge of a rotating wheel. The beam then traveled to a mirror 8 km/5 mi away and returned to the wheel where, if the spin were fast enough, a tooth would block the light. Knowing this time from the rotational speed of the wheel, and the mirror's distance, Fizeau directly measured the speed of light. He also found that light travels faster in air than in water, which confirmed the wave theory of light, and that the motion of a star affects the position of the lines in its spectrum. With Jean Foucault, he proved the wave nature of the Sun's heat rays by showing their interference (1847). |
A old woman was sipping on a g...
A old woman was sipping on a glass of wine, while sitting on the patio with her husband, and she says,"I love you so much, I don't know how I could ever live without you"...
Her husband asks, "Is that you, or the wine talking?
She replies, "It's me...talking to the wine."
Her husband asks, "Is that you, or the wine talking?
She replies, "It's me...talking to the wine."