Answer: 1 × 1010 Hz.
- A 1 × 1010 Hz
- B 1 × 109 Hz
- C 1 × 1011 Hz
- D 3 × 108 Hz
Correct answer: A. 1 × 1010 Hz
Explanation: f = c/λ = (3 × 108)/(0.03) = 1 × 1010 Hz.
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.