Answer: 1/√(μ0ε0).
- A √(μ0ε0)
- B 1/√(μ0ε0)
- C μ0ε0
- D 1/(μ0ε0)
Correct answer: B. 1/√(μ0ε0)
Explanation: Maxwell showed c = 1/√(μ0ε0), which evaluates to about 3 × 108 m/s.
In an electromagnetic wave, the oscillating electric field (E) and magnetic field (B) are perpendicular to each other and to the direction the wave travels - a purely transverse wave that needs no medium, unlike sound.
Concept context
Maxwell's equations, EM spectrum, properties, and applications of each band.