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

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

e) none of the above answers are correct

c)as speed changes, wavelength and frequency change.

everything changes!