Fizeau’s classic toothed wheel experiment is remembered for timing flashes to estimate which constant?
Q1. Fizeau’s classic toothed wheel experiment is remembered for timing flashes to estimate which constant?
Answer: Speed of light in air
Explanation: In 1849 Hippolyte Fizeau used a rapidly rotating toothed wheel to chop a light beam into pulses; by measuring the wheel rotation speed at which returning reflected pulses passed back through the gaps, he calculated the first terrestrial estimate of the speed of light (about 3.1 × 10⁸.