posted by mary .
What is the wavelength of a photon with an energy of 6.35 10-19 J? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)
E = h*c/(wavelength)
c is the speed of light and h is Plank's #. Solve for the wavelength