J'ai un devoir à faire en anglais mais les questions 1 et 3. Malgré leur simplicité je n'y arrive pas. J'ai répondu de la manière la plus simple possible mais l

Réponse :

1) This document is the extract of the novel Curie and Radioactivity from Paul Stathern. This extract underlines that Röntgen discovered X-Rays. After that, Becquerel tried also to « make » X-Rays with fluorescent materials. But he finally discovered something new, accidentally, which make him wonder a new form of radiation.

3) Becquerel accidentally discovers radioactivity while researching the fluorescence of uranium salts.

Bon courage pour la suite :)