The magnetic field intensity of uniform plane wave in air is 20 A/m in the direction ay. The wave is propagating in the az direction at a frequency of 2 × 10^9 rad/s. What is the wave length of the plane wave.
- A. 3/20 m
- B. 3/10 m
- C. 3π/20 m
- D. 3π/10 m