Based on the following graph, which metal will emit the highest energy photoelectron when a photon with a wavelength of 650 nm is incident on the metal?
A) a
B) b
C) c
D) d

Question

Based on the following graph, which metal will emit the highest energy photoelectron when a photon with a wavelength of 650 nm is incident on the metal? 
A) a 
B) b 
C) c 
D) d

Quizplus · Accepted Answer

From the graph, we can see that metal A has the highest work function, which means it requires the most energy to remove an electron. Therefore, when a photon with a wavelength of 650 nm (red light) is incident on the metals, only metal A will not emit any electrons because the energy of the photons is not enough to overcome its work function. The other metals have lower work functions and will emit electrons, but according to the photoelectric effect, the energy of the emitted electrons will be equal to the energy of the photons minus the work function. Since metal A requires the most energy to remove an electron, the emitted electrons from the other metals will have higher energies, with metal C having the highest as it has the lowest work function.

Based on the Following Graph, Which Metal Will Emit the Highest