Question

1. which is the formula for determining the period of a wave?

a $\frac{1}{t}$ c $\frac{300\times10^{6}}{f}$
b $\frac{1}{lambda}$ d $\frac{1}{f}$

Explanation:

The period ($T$) of a wave is the reciprocal of its frequency ($f$). That is, $T=\frac{1}{f}$, where frequency is the number of wave - cycles per second and period is the time taken for one complete wave - cycle.

Answer:

D. $\frac{1}{f}$