alleryElectromagnetic waves travel at which speed in free space?
ASpeed of light
BSpeed of sound
CSpeed of Earth
DSpeed of winds
Answer & Solution
Correct answer: A. Speed of light
1. Maxwell computed the wave speed from his equations.
2. It matched a value already known from optics.
3. The waves travel at the speed of light.
4. So the answer is speed of light.
_Source: syllabus Physics, Ch 8 'Electromagnetic Waves'_
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