Posted by **Trina** on Monday, December 10, 2012 at 12:18am.

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

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