Multiple choice

Which of the following discoveries did Henry Becquerel discover?

  1. Gravitation

  2. Relativity

  3. X-rays

  4. Radioactivity

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Henri Becquerel discovered radioactivity in 1896 while investigating uranium salts. Gravitation is Newton's, relativity is Einstein's, and X-rays are Roentgen's.