Question

A metal surface is struck with light of wavelength 430 nm releasing a stream of electrons.  If the 430 nm light is replaced by 380 nm light of the same intensity, what is the result?

a.
no change to the emitted electrons
b.
emitted electrons are more energetic
c.
more electrons are emitted in a given time interval
d.
fewer electrons are emitted in a given time interval
e.
emitted electrons are less energetic
b.
emitted electrons are more energetic

Einstein's relation for phptoelectric effect: hc/λ=v W= KE,
λ↓ KE↑

Related Questions

When light of a wavelength of 125 nm strikes a certain metal, electrons having a velocity of 8.2 x 1... It takes 254 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength... To eject electrons from the surface of potassium metal, 222kJ/mol of electrons are needed. a) What... When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted el...