If the Binding Energy of an Electron Is 6

Multiple Choice

If the binding energy of an electron is 6.41 × 10 ^{− 19} J, what wavelength of photon is required to liberate it from the atom? Planck's constant = 6.626 × 10 ^{− 34} Js; c = 3.00 × 10 ⁸ m\ s

A) 310 nm
B) 641 nm
C) 1.53 μ m
D) 2.18 μ m