Which best describes the results of Becquerel’s experiments?

Question

When placed in sunlight, the uranium did not form an image and when placed in darkness, the uranium did form an image.
When placed in sunlight, the uranium did form an image and when placed in darkness, the uranium did not form an image.
Both formed images when placed in their respective places.
Neither formed images when placed in their respective places.

Answer 1

The best description of the results of Becquerel's experiments is:

When placed in sunlight, the uranium did form an image and when placed in darkness, the uranium did not form an image.

In his experiments, Henri Becquerel discovered that uranium salts emitted radiation without the need for an external energy source like sunlight, which was a significant finding leading to the discovery of radioactivity. However, when he initially experimented with exposing uranium to sunlight, he observed that it did not produce an image unless it was later developed in darkness, indicating that the radiation itself was responsible for the imaging.