Question

What is the frequency (in reciprocal seconds) of electromagnetic radiation with a wavelength of 1.07 cm?

Answer 1

If the electromagnetic radiation is travelling in vacuum, the velocity of the wave should be 3×10^8 m/s
Using the wave formula,
Velocity=wavelength×frequency,
frequency=(3×10^8)/(0.0107)

Answer 2

Answer :  The frequency of electromagnetic radiation will be $2.804\times 10^{10}s^{-1}$

Explanation :

As we are given the wavelength = 1.07 cm

conversion used : $(1m=100cm)$

So, wavelength is  $1.07\times 10^{-2}m$

The relation between frequency and wavelength is shown below as:

$Frequency=\frac{c}{Wavelength}$

Where, c is the speed of light having value = $3\times 10^8m/s$

So, Frequency is:

$Frequency=\frac{3\times 10^8m/s}{1.07\times 10^{-2}m}$

$Frequency=2.804\times 10^{10}s^{-1}$

Therefore, the frequency of electromagnetic radiation will be $2.804\times 10^{10}s^{-1}$