Answer:
Wavelength = 6.33 × 10⁻⁴ m
Step-by-step explanation:
We must use the formula:
Wave speed (v) = Frequency (f) × Wavelength (λ)
All electromagnetic waves have a speed of 3.0 × 10⁸ m/s
So substitute the values into the formula.
3.0 × 10⁸ = 4.74 × 10¹¹ × λ
λ = (3.0 × 10⁸) ÷ (4.74 × 10¹¹)
λ = 6.33 × 10⁻⁴ m