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
To determine the period of the radio waves, you need to convert the frequency from megahertz (MHz) to hertz (Hz).
1 MHz is equal to 1,000,000 Hz. So, to convert 80.9 MHz to Hz, you can multiply it by 1,000,000:
80.9 MHz * 1,000,000 = 80,900,000 Hz
Now that you have the frequency in Hz, you can calculate the period using the formula:
Period = 1 / Frequency
Period = 1 / 80,900,000 Hz
Therefore, the period of the radio waves is approximately 0.00000001235 seconds or 12.35 nanoseconds.