Working on electeomagnetic wavelengths in class. This is so confusing....... My teacher explained it to a point, but im still not understanding. Help me please!!!
Without units for the wavelength, my answer will be meaningless, but I'll put it out there anyway. :)
Wavelength is often reported in nanometers, so I'll assume you're talking about 72.6 nm, which is in the infrared range.
The speed of light (c) is equal to the wavelength (λ) times the frequency (ν): c = λν
So, the frequency is: ν = c / λ
Now it's plug and chug, and making sure that the units cancel properly. Frequency should be in reciprocal seconds (s–1), which is also known as Hertz (Hz).
ν = c / λ = (2.998 x 108 m/s) / [(72.6 nm) x (1 m / 109 nm)] = 4.13 x 1015 s–1