Question

All electromagnetic waves travel in vacuum at the speed of c=3×10^8 m/s. Find the wavelength of microwaves of frequency 10^10 Hz

Answer 1

Recall the wave equation,
`c=f\lambda` where c is the speed of the wave (m/s), f is the frequency of the wave (Hz) and λ is the wavelength of the wave (m).


`c=f\lambda \Rightarrow \lambda = (c)/(f)` so
`\lambda = (3 * 10^8)/(10^(10)) = 0.03 \text{m}`