[NinaNicole]

I do virtual school online and today my chemistry teacher gave us some classwork on calculating the frequency of radiation and I am so confused Could anyone help me with this problem:
  Electromagnetic radiation at the blue end of the visible spectrum has a wavelength of 400 nm. Calculate the frequency of the radiation.

[ARGOS++]

Dear NinaNicole,

Do you know what the Definition of “Wavelength” is?
And do you know how far the light travels in/during 1.00 sec?

In this case I think it is quite easy, also for you, to calculate the corresponding frequency of light with a wavelength of 400 nm (Nano-Meter = 10^-9 m).

Good Luck!
                    ARGOS⁺⁺