O-LevelPhysicsWaves5054/11 · Oct/Nov 2020 · Q261 Mark
An electromagnetic wave has a speed of 3.0 × 10⁸ m/s and a wavelength of 10 cm. What is the frequency of the wave?
A3.3 × 10⁻¹⁰ Hz
B3.3 × 10⁻⁸ Hz
C3.0 × 10⁷ Hz
D3.0 × 10⁹ Hz
✓ Correct answer
D: 3.0 × 10⁹ Hz
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