A wave travels at 300 m s⁻¹ with wavelength 3 m. Calculate frequency.

Solution & explanation

1. Given: v = 300 m s⁻¹; λ = 3 m.

2. Find: f in Hz

3. Start with v = fλ.

   $$v=f\times \lambda$$

4. Divide both sides by wavelength.

   $$f=\frac{v}{\lambda }$$

5. Substitute speed and wavelength.

   $$f=\frac{300}{3}$$

6. Perform the division.

   $$f=100$$

7. State the result with units: f = 100 Hz

f = 100 Hz