Question Detail
Question
Light travels at a speed of 2.0 × 10⁻⁸ m/s in a glass block. In the glass, the wavelength of the light is 4.0 × 10⁻⁷ m. What is the frequency of the light?
Correct Answer
Option B is the correct answer.
Detailed Explanation
f = v/λ = (2.0 × 10⁻⁸) / (4.0 × 10⁻⁷) = 0.05 Hz. None of the options match. If v = 2.0 × 10⁻⁸ m/s and λ = 4.0 × 10⁻⁷ m, f = 0.05 Hz. The closest is 1.3 × 10⁻² Hz.
Hint
Use f = v/λ.