Multiple choice general knowledge

With which of the following theories is the formula E=mc 2 most closely associated?

  1. General relativity

  2. Special relativity

  3. The blackbody Effect

  4. Planck's law

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

E=mc² emerges from special relativity (1905), relating mass and energy. General relativity (1915) deals with gravity. Blackbody radiation and Planck's law are quantum phenomena, though connected to Einstein's other work.