The relationship between frequency and wavelength for an electromagnetic wave is

where
f is the frequency

is the wavelength

is the speed of light.
For the light in our problem, the frequency is

, so its wavelength is (re-arranging the previous formula)
It’s true there are sections in the periodic table that define the elements.
Answer:
The rate at which energy is transferred is called power and the amount of energy that is usefully transferred is called efficiency.