What is the wavelength of a photon that has an energy of #4.41 x 10^-19#?

1 Answer
Sep 21, 2016

What unit of energy are you using? I assume it's J...? In which case its about 4.5 x #10^-7# m

Explanation:

If you use Planck-Einstein equation, E = h.f where h is Planck's constant, which 6.626 x #10^-34# J.s, then you can work out the frequency: f = E/h, = 4.41 x #10^-19#/6.626 x #10^-34# = 6.655 x #10^14# Hz.

Then convert frequency to wavelength using #lambda# = c/f where c is the speed of light, 3 x #10^8# m/sec.

#lambda# = 3 x #10^8# / 6.655 x #10^14# = 4.51 x #10^-7# m.