Chemistry
posted by Trina .
The equation for photon energy, , is
where = 6.626×10−34 (Planck's constant) and = 3.00×108 (the speed of light).
What is the wavelength, , of a photon that has an energy of = 3.99×10−19 ?
How do go about solving this? I multipled the constant w/ the speed of light and divided it by the proton energy but its not correct

The method appears ok but you would do better to show your work and your answer.