Resposta :
Resposta:
1. X-rays were discovered in 1895.
2. X-rays were discovered by Roentgen.
3. ° they travel in straight lines;
° they are uncharged;
° they are a wave motion phenomenon;
° the waves are transverse.
4. Present, particularly, impression, historical, importance, discussion, modern, experiment, atomic, magnetic.
- Bons estudos :)