A. Light
B. Sound
C. Jet
D. None of these
A. Light
The electromagnetic waves travel in free space with a speed of:
A. Light
More specifically, the speed of electromagnetic waves in free space is approximately:
- 3 x 10^8 meters per second (m/s)
- Often written as “c”
This speed is a fundamental constant in physics and is known as the speed of light.
The other options are not correct:
- B. Sound: Sound travels much slower than light, typically around 343 m/s in dry air at room temperature.
- C. Jet: The speed of a jet airplane is much slower than the speed of light and depends on the specific jet’s design and operating conditions.