Answer: 1 kg·m/s.
- A 3×10⁻⁸ kg·m/s
- B 1 kg·m/s
- C 3×10⁸ kg·m/s
- D 9×10¹⁶ kg·m/s
Correct answer: B. 1 kg·m/s
Explanation: p = U/c = 3×10⁸/(3×10⁸) = 1 kg·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.