Sarah Zelenka (born June 8, 1987) is an American rower. She was a member of the 2012 US Summer Olympic team, having competed in the women's pair race.
Zelenka was born in Park Ridge, Illinois. She was a basketball player at Lake Park High School. She did not start rowing until her freshman year of college at Grand Valley State University. In 2008, Zelenka helped lead Grand Valley's women's eight to the American Collegiate Rowing Association national title. In the 2009 World Rowing Under-23 Championships, she finished sixth in the women's four. In the 2010 World Rowing Cup, Zelenka won golds in the women's four and eight. At the 2011 World Rowing Championships, she won gold in the women's four. With partner Sara Hendershot, Zelenka won the U.S. Olympic trials for the women's pair to qualifying for the 2012 Summer Olympics. On July 28, 2012 Zelenka made it to the Olympic finals with a time of 6:59.29. In the finals, Sarah came in fourth with a time of 7:30.39.
Photography is the science, art, application and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic image sensor, this produces an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. The result with photographic emulsion is an invisible latent image, which is later chemically "developed" into a visible image, either negative or positive depending on the purpose of the photographic material and the method of processing. A negative image on film is traditionally used to photographically create a positive image on a paper base, known as a print, either by using an enlarger or by contact printing.
Photography is employed in many fields of science, manufacturing (e.g., photolithography), and business, as well as its more direct uses for art, film and video production, recreational purposes, hobby, and mass communication.;
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