Question

Yellow light has a frequency of 5.2 × 1014 Hz and travels at a speed of 3.0 × 108 m/s. What is the wavelength of yellow light, in meters?

5.8 × 10–7 m
2.2 × 10–6 m
1.7 × 106 m
8.2 × 1022 m

Answer 1

Use λ = v / f.
λ = (3.0 × 10^8 m/s) / (5.2 × 10^14 Hz) = 5.77 × 10^-7 m ≈ 5.8 × 10^-7 m.