Recent content by bear421

I think I figured it out! E = .5 * m * v^2

Homework Statement This is a basic photoelectric type question. What wavelength of light is necessary to produce photo-electrons of speed 2 * 10^6 m/s with a magnesium target? Homework Equations KE = pf - phi phi = 3.7 eV h = 6.63 * 10 ^-34 The Attempt at a Solution I don't know how to...