The frequency range for FM broadcasts is from 87.9 - 107.9 MHz in the U.S.In terms of wavelengths,the range corresponds to
A)87.9 - 107.9 m
B)2.78 - 3.41 m
C)83.3 - 102.3 m
D)12.4 - 19.5 m
E)None of these is correct.

Question

Quizplus · Accepted Answer

The wavelength corresponding to a frequency range can be calculated by using the formula: wavelength = speed of light / frequency. The speed of light is approximately 3x10^8 m/s. Therefore, the wavelength range for FM broadcasts in the U.S. can be calculated as follows:

- For the lowest frequency (87.9 MHz): wavelength = 3x10^8 / 87.9x10^6 = 3.41 m
- For the highest frequency (107.9 MHz): wavelength = 3x10^8 / 107.9x10^6 = 2.78 m

Therefore, the wavelength range for FM broadcasts in the U.S. corresponds to 2.78 - 3.41 m, which is best represented by choice B).

The Frequency Range for FM Broadcasts Is from 87