Question

What is the wavelength of electromagnetic radiation having a frequency of 5.11 ✕ 1012 Hz?

Answer 1

we know that frequency =speed/wavelength
this wavelength=speed/frequency =3*10^8/5.11*10^12=(3/5.11)*10^-4=(0.587)*10^-4
=0.587*10^-4=58.7*10^-6=58.7micro m

Answer 2

Given, Frequency (f) = 5.11×10^12 Hz
we know
f = c/ lambda
where c = 3×10^8m/s = velocity of light
So, lambda (wavelength ) = c/f
or = (3×10^8)/(5.11×10^12)
or, lambda = (3/5.11)× 10^-4
or, lambda = 5.9 ×10^-5m is the required wavelength of electromagnetic radiation