Question

Calculate the kinetic energy of the photoelectron emitted by a metal (threshold energy is 1.50 x 10^-19J) exposed to light of wavelength 5.00 x 10^-7 m (the energy beyond that required to knock electron goes into electron kinetic energy).

A) -3/98 x 10^-19J
B) 3.98 x 10^-19J
C) 2.48 x 10^-19J
D) 1.50 x 10^-19J
E) 8.3141J
dE = hc/lambda = ?
KE = dE-threshold

Related Questions

If a metal with a threhold frequency of 1.1 x 10^15 Hz is illuminated by light with a wavelength of... When a photon of light hits the surface of a metal, a photoelectron may be emitted. Some of the phot... If the minimum (threshold) energy for the emission of an electron from the surface of a particular m... A metal surface of threshold wavelength 550 nm is irradiated with blue light of wavelength 450 nm. C...