The relationship between the speed v, frequency f and wavelength of a wave is
- A. v equals f divided by wavelength
- B. v equals f times wavelength
- C. v equals wavelength divided by f
- D. v equals f plus wavelength
Explanation
In one period the wave advances exactly one wavelength, so dividing wavelength by period gives the speed, and since frequency is the reciprocal of period this becomes v equals f multiplied by wavelength. Speed is fixed by the medium, so raising the frequency shortens the wavelength in proportion. That inverse relationship is the point most questions turn on.