Solving for a characteristic wavelength?
What is its characteristic wavelength? [Hint: Recall that the kinetic energy of a moving object is E = (1/2)m(v^2)]
So i first tried solving the problem by solving for v: 3.02811351*10^-15 = (1/2)m(v^2) where m is the mass of an electron which is 9.11 x10^-31.
Then i used λ = hv/E to solve for λ where h is 6.626*10^-34 v is the velocity that i solved for an E is 3.02811351*10^-15 J
Is this the correct way because i got a wrong answer, what am i doing wrong? Thanks