Question

Which event best helped Becquerel determine uranium radiates rays?

Answer 1

Exposure of a photographic plate

Answer 2

Answer:

exposure of a photographic plate is the correct answer.

Explanation:

Henri Becquerel discovered radioactivity by his studies of uranium and he was particularly interested in uranium and its substance.

He unexpectedly noticed that When uranium-rich element named pitchblende releases invisible and penetrating radiations that darken the photographic plate.

To find whether the phosphorescent uranium salts may absorb the sunlight and emit it again in the form of  X-ray or not he used photographic plates.

Thus Exposure of a photographic plate helped Becquerel determine uranium radiates rays.