A photon of wavelength 400 nm is absorbed by a hydrogen atom. What is the energy of this photon?
Q1. A photon of wavelength 400 nm is absorbed by a hydrogen atom. What is the energy of this photon?
Answer: 3.10 eV
Explanation: Energy = hc/λ = (6.63×10^-34 × 3×10^8)/(400×10^-9 × 1.6×10^-19) = 3.10 eV. Other options are incorrect calculations.