Wave model of light - 2 | Early Quantum Theory

Hydrogen has an indigo emission line at 410.2 nm.
What is the energy and frequency of a photon of this light?

E = hν = hc/λ

E =  6.626 × 10-34× 3.0 × 108410.2 × 10-9   = 4.846 x 10-19 J

 

c = λν ⇒ ν = c / λ = 7.314 x 1014 s-1