Carmel Luther Roemer May 7, 1904 – Apr. 23, 1980 South Bend Tribune 4/24/1980 Mrs. Carmel Luther Roemer, 75, formerly of 422 E. Angela, died at 8:05 a.m. Today in the Cardinal Nursing Home after a one year illness. Born on May 7, 1904 in South Bend, she had lived here all her life. She was a teacher at St. Potter Roemer/ Fire Pro® deck monitors were specifically designed to meet all requirements of municipal and petrochemical applications. Monitors are equipped with a vinyl-dipped steering wheel control handle with polished stainless steel connector bracket.
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Roemer appeared in the movie in a cameo walk-on-role. His life's work now complete, Bill Roemer, a man for all seasons, has gone to his maker. He has been laid to rest along side of his parents at the Cedar Grove Cemetery in South Bend, Indiana, not far from his alma mater and the site of his youthful accomplishments in the athletic realm.
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Ole Rømer, a Danish astronomer, calculated the speed of light by observing the eclipses of Jupiter's moon during the years 1668–1674. A discrepancy was observed for the time between the eclipses, increasing when the Earth was moving away from Jupiter and decreasing when the Earth was approaching. In half a year, there are a total of 102 eclipses of Io, giving a maximum delay of 16.5 minutes (shown in the bottom-right plot). Rømer interpreted this as the difference in the times needed for the light to travel between Jupiter and Earth. He obtained a value of 214,000 km/s compared to the current value 299,792 km/s. The diameter of the Earth's orbit was not accurately known and there was also an error in the measurement of the delay. Nevertheless, it was a first confirmation that the speed of light is finite.
Contributed by: Enrique Zeleny(April 2010)
Open content licensed under CC BY-NC-SA
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The time delay of an eclipse of Io is given by
,
where and are the radii of the orbits of the Earth and Jupiter, is the angular velocity of Earth, represents the period of Io, and is Io's period; finally, is the distance when the Earth is closest to Jupiter and is the velocity of light.
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[1] J. H. Shea, 'Ole Rǿmer, the Speed of Light, the Apparent Period of Io, the Doppler Effect, and the Dynamics of Earth and Jupiter,' Am. J. Phys., 66(7), 1988 pp. 561–569.
Related Links
Roemer Laptops & Desktops Driver Download For Windows 7
- Period (Wolfram ScienceWorld)
- Speed of Light (Wolfram ScienceWorld)
- Eclipse (Wolfram ScienceWorld)
- Roemer, Olaf (1644–1710) (Wolfram ScienceWorld)