A photocell is a device that operates using the photoelectric effect.What metal should be used if it is desired that the photocell operate using visible light?
A) manganese ($\phi$ = 4.1 eV)
B) gadolinium ($\phi$ = 2.90 eV)
C) cesium ($\phi$ = 2.14 eV)
D) beryllium ($\phi$ = 4.98 eV)

Question

Quizplus · Accepted Answer

The metal with the lowest work function is the best choice for a photocell to operate using visible light. Among the options given, cesium has the lowest work function (2.14 eV), making it the best choice for a photocell operating with visible light.

A Photocell Is a Device That Operates Using the Photoelectric ϕ\phiϕ

A Photocell Is a Device That Operates Using the Photoelectric $\phi$