Question

Our eyes are sensitive to electromagnetic radiation with wavelengths from 400nm to 700nm. What is associated range of frequencies?

Answer 1

Upper frequency limit = c/(shortest wavelength)
= 3*10^8 m/s/400*10^-9 m
= 7.5*10^14 Hz

Lower frequency limit = c/(longest wavelength)
= 3*10^8/700*10^-9 = _____ Hz

Answer 2

thank you! :)