He found that even without contact to sunlight, the uranium was emitting radiation. While Becquerel initially believed the rays he was observing were similar to x-rays, further experiments should that unlike x-rays, the magnetic and electric fields of these rays could be deflected.
Becquerel had, in fact, discovered radioactivity. Browse our collection of oral histories with workers, families, service members, and more about their experiences in the Manhattan Project.
Sense of Place. Skip to main content. Henri Becquerel. Abel Niepce de Saint Victor, a photographer, was experimenting with various chemicals, including uranium compounds.
Like Becquerel would later do, he exposed them to sunlight and placed them, along with pieces of photographic paper, in a dark drawer. Upon opening the drawer, he found that some of the chemicals, including uranium, exposed the photographic paper.
Niepce thought he had found some new sort of invisible radiation, and reported his findings to the French Academy of Science. No one investigated the effect any further until decades later when Becquerel repeated essentially the same experiment on that gray day in March Follow Us.
Outstanding Referees Gain Overdue Recognition. Members in the Media. This Month in Physics History. Washington Dispatch. International News. Climate Change. Climate Feedback. Ocean Acidification. They had a son Jean, b. It was later edited and republished in Nobel Lectures.
To cite this document, always state the source as shown above. Back to top Back To Top Takes users back to the top of the page. Nobel Prizes Thirteen laureates were awarded a Nobel Prize in , for achievements that have conferred the greatest benefit to humankind.
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