Question

What is the wavelength of an FM radio

signal if the number on the dial reads 88.6
MHz? The speed of light is 3 x 108 m/s.
Answer in units of m.

Answer 1

V = 3.0 x 10⁸ m/s (This is the same for all types of electromagnetic waves)

f = 88.6 MHz = 8.86 x 10⁷ Hz

λ = ?

V = fλ

λ = V/f = (3 x 10⁸)/(8.86 x 10⁷)

= 3.4 m [Ans]

Hope this helps!