Question

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?

Answer 1

Answer:

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