What did Henri becquerel discover about uranium?

Answer 1

Antoine Henri Becquerel discovered in 1896 the natural radioactivity of uranium. The emitted radiations have effect on a photographic plate, the emulsion was decomposed under the uranium sample.

Answer 2

He knew that fluorescent substances glow in the dark. In 1896 he devised an experiment to find out if fluorescent substances would give of x-rays. He wrapped photographic film in light-proof paper . Then he placed uranium salt on top of the paper. He left these materials in direct sunlight to cause the uranium to become fluorescent.

When he developed the film, he saw an image.

(second time around) He prepared the uranium salt, light-proof paper, and film. Then the weather turned cloudy for two days, and he put the materials in a drawer. After many days, he went ahead and developed the second film. He found the image as clear and strong as the image produced in sunlight.

So sunlight had nothing to do with the image on the film. It was radioactivity .

Hope this helps:)

Answer 3

Becquerel wrapped a fluorescent substance, potassium uranyl sulfate, in photographic plates and Becquerel wrapped a fluorescent substance, potassium uranyl sulfate, in photographic plates and black material in preparation for an experiment requiring bright sunlight material in preparation for an experiment requiring bright sunlight.

Answer 4

It was an accident, not a deliberate experiment.

He had left unexposed wrapped up photographic plates in a drawer. Sometime later he put some samples of uranium ore in the same drawer on top of the wrapped plates. Later, when he removed the plates he developed a few unexposed to verify they were still good after all that time in storage. But he found them inexplicability fogged, exactly where the uranium ore had sat, the same on every plate. Instead of simply trashing the plates, he realized he must be observing a previously unknown phenomenon.

At this point he began the deliberate and careful experiments to identify and characterize the unknown source of energy that fogged photographic plates through their opaque wrappers.

Answer 5

Henri Becquerel was a partner of the Curies during their research. On his own, he discovered that uranium salts emitted a penetrating radiation that was different than x-rays.

Answer 6

his hypothesis was that uranium salt gives off x-rays would pass through the paper and produce an image on the film.

Answer 7

He discovered solar energy

Answer 8

Radioactivity

Answer 9

something to do with radiation :)