WAEC Physics 2016 Paper

Concept:The wave equation connects velocity, frequency, and wavelength in one simple relation.Explanation:The distance travelled by one complete wave cycle is its wavelength $\lambda$.The wave covers this distance in one time period $T$, so its speed is $v = \dfrac{\lambda}{T}$.Since frequency $f$ equals $\dfrac{1}{T}$, substituting gives $v = f\lambda$.Rearranging this correct relation to solve for frequency yields $f = \dfrac{v}{\lambda}$.This is exactly option B.Answer:B. $f = \dfrac{v}{\lambda}$