Answer: 3 m.
- A 0.3 m
- B 3 m
- C 30 m
- D 300 m
Correct answer: B. 3 m
Explanation: λ = c/f = 3×10⁸/(100×10⁶) = 3 m.
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.