Question

Velocity of light was first determined in the laboratory by

• A. Foucault
• B. Galileo
• C. Michelson
• D. Newton

Answer 1

The correct option is A

Foucault

Explanation of correct option:

1. In the year $1862$ Bernard-Leon Foucault calculated the speed of light using the Fizeau-Foucault apparatus.
2. Foucault measured the speed of light to be $299796{\text{km s}}^{-1}$.

Final answer: Velocity of light was first determined in the laboratory by Foucault.

Hence, correct option is (a)