Why was Becquerel's experiment a first step in discovering radioactivity?

A. It showed that a substance could phosphoresce when it was not exposed to light.

B. It showed that the substance that was used by Becquerel could phosphoresce.

C. It showed that a substance could constantly emit radiation even if it was not exposed to light.

D. It showed that a substance emitted radiation when it

was exposed to light.

Question

Chemistry

Anya Klein

22 May, 11:40

Why was Becquerel's experiment a first step in discovering radioactivity?

A. It showed that a substance could phosphoresce when it was not exposed to light.

B. It showed that the substance that was used by Becquerel could phosphoresce.

C. It showed that a substance could constantly emit radiation even if it was not exposed to light.

D. It showed that a substance emitted radiation when it

was exposed to light.

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Answers (1)

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Lee Stout · Answer 1

C.

The findings occurred after a radioactive substance was left in a closed space, inaccessible to sunlight, with some photographic plates. The conclusion drawn from this was that emission of radiation can occur without sunlight, contrary to the prior belief.