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anithajp jp

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Ernst Abbe

Born 23 Jan 1840; died 14 Jan 1905 at age 64.German physicist who established a technical and theoretical foundation for the design of optical instruments. The Abbe sine condition enabled designing lenses without spherical aberation's image distortion. He invented the apochromatic lens system (1868), and added the Abbe condenser lens to improve illumination for the microscope (1870). He used homogenous immersion of specimen and microscope objective in cedar oil with matching refractive index to give higher magnification. He invented the Abbe refractometer to measure a refractive index. From 1866, he collaborated with Carl Zeiss to produce high quality optical instruments. He became sole owner of the Zeiss optical works in 1888. From 1878, he also was director of the University of Jena astronomical and meteorological observatories.«

Blonde Bet

Bob, a handsome dude, walked into a sports bar around 9:58 PM
He sat down next to a blonde at the bar and stared up at the TV.
The 10:00 PM news was coming on. The news crew was covering a story of a man on a ledge of a large building preparing to jump.
The blonde looked at Bob and said, 'Do you think he'll jump?' Bob says, 'You know, I bet he'll jump.'
The blonde replied, 'Well, I bet he won't.' Bob placed a $20 bill on the bar and said, 'You're on!'
Just as the blonde placed her money on the bar, the guy on the ledge did a swan dive off the building, falling to his death.
The blonde was very upset, but willingly handed her $20 to Bob, saying, 'Fair's fair. Here's your money.'
Bob replied, 'I can't take your money, I saw this earlier on the 6 PM news and so I knew he would jump.'
The blonde replied, 'I saw it too; but I didn't think he'd do it again.'
Bob took the money......
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