Determine the wavelengths that hydrogen atoms absorb to reach the n = 8 and n = ...

Determine the wavelengths that hydrogen atoms absorb to reach the n = 8 and n = 9 states from the ground state. In what region of the electromagnetic spectrum do these photons lie? λ (n = 8) =_______________nm, λ (n=9)=______________________ nm. These photons lie in the_________________region.