Question

In the late 1890s, what objection might have been raised about Becquerel’s claim that the uranium salt crystals had emitted something that exposed the photographic film?

There was no apparent source for the uranium salts’ energy.

Film only becomes exposed in response to light.

Both the crystals and the film had been exposed to sunlight during the experiment.

The crystals began to phosphoresce in the drawer and release X-rays.

Answer 1

A- There was no apparent source for the uranium salts' energy (just took the edg test)

Answer 2

The correct answer is "There was no apparent source for the uranium salts’ energy."

Step-by-step explanation:

Becquerel while working on X-rays accidentally discovered radioactivity. While working with uranium salts he observed that it emitted penetrating radiation that exposed photographic film. His contemporaries did not know radioactivity and hence they believed that there was no apparent source for the uranium salts’ energy.