Cell phone conversations are transmitted by high-frequency radio waves. Suppose the signal has wavelength 36.5 cm while traveling through air. What is the frequency as the signal travels through 3-mm-thick window glass into your room?

f=8.219*10^{8}Hz

Explanation:

We are going to use the formula v=fλ

Where v = velocity of radio waves

f = frequency

λ = wavelength of wave

radio waves are electromagnetic waves and as such they have the speed of light which is 3*10^{8}m/s. also when a wave travels from one medium to another, the wavelength changes while the frequency remains the same. calculating for the frequency of the wave in air also gives us the frequency in the window glass.

f=/frac{v}{λ}

v=3*10^{8}m/s.

λ=36.5 cm = 36.5/100 = 0.365m

f=/frac{3*10^{8}m/s.}{0.365m}

f=8.219*10^{8}Hz