posted by Josh .
An FM radio station broadcasts at 80.9MHz. Determine the period of the radio waves.
i know period is just 1/freq. so what would i convert 80.9 MHz into???
The period is the reciprocal of the frequency, as you stated.
80.9 MHz means 80.9*10^6 cycles per second
P = 1/f = 1/(80.9*10^6 s^-1)
= 1.24*10^-8 seconds