Question

Becquerel expected to find (an)____when he developed the photographic plate that had Sun-exposed minerals on top of it. Becquerel expected to find (an)____when he developed the photographic plate that had been in the closed drawer.

Answer 1

The answer is: image of the object.

Antoine Henri Becquerel (1852 – 1908) was a French physicist and the first person to discover evidence of radioactivity.

Becquerel wrapped fluorescing crystal (uranium salt potassium uranyl sulfate) in a cloth, along with the photographic plate and a copper Maltese cross.

Several days later, he discovered that a image of the cross appeared on the plate.

The uranium salt was emitting radiation.

Because of this discovery, Becquerel won a Nobel Prize for Physics in 1903, which he shared with Marie Curie and Pierre Curie.

Answer 2

Answer: 1) image 2) no image

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