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Бранко Пантелић

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How much is 4x5?

Philipp Lenard

Died 20 May 1947 at age 84 (born 7 Jun 1862). Philipp Eduard Anton von Lenard was a Hungarian-German physicist who received the 1905 Nobel Prize for Physics for his research on cathode rays. He discovered they could leave a cathode ray tube, penetrate thin metal sheets, and travel a short distance in the air, which would become conducting.. In 1902, he observed that a free electron (as in a cathode ray) must have at least a certain energy to ionize a gas by knocking a bound electron out of an atom. His estimate of the required ionization energy for hydrogen was remarkably accurate. Also in 1902, he showed that the photoelectric effect produces the same electrons found in cathode rays, that the photoelectrons are not merely dislodged from the metal surface but ejected with a certain amount of energy.

A man was in a hurry to meet ...

A man was in a hurry to meet his friend down at the nearby lake. On the way down there, he was stopped by a man fully dressed in red. The man pulled over, and the red man asked, "Hi, I'm the red jerk of the highway. Have anything to eat?" The man smiled and handed him a sandwich. He continued down the highway and was yet again pulled over by a man fully dressed in green. He stopped and the guy in green said, "Hi, I'm the green jerk of the highway. Have anything to drink?" Without smiling, the man handed the green guy his coke. He started off again and started to speed down the highway. Yet again he was stopped by a guy fully dressed in blue. Sighing, he pulled over and pulled down his window, leant out and said, "Let me guess. You're the blue jerk of the highway. What do you want?" "Registration and license please" came the reply.
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