Question

The electromagnetic waves travel with

• A. the same speed in all media
• B. the speed of sound in free space
• C. the speed of light $c=3\times 10^{8}m{s}^{-1}$ in solid medium
• D. the speed of light $c=3\times 10^{8}m{s}^{-1}$ in fluid medium
• E. the speed of light $c=3\times 10^{8}m{s}^{-1}$ in free space

Answer 1

Answer: (E)

The electromagnetic wave travel with the speed of light $c=3\times 10^{8}m{s}^{-1}$ in free space.