Question

A student performs the photoelectric effect experiment and obtains the data depicted in the accompanying graph of E_km (max kinetic energy) of photoelectrons vs the frequency of the photons. What is the approximate work function of this material?

A) 1.5 eV 

B) 2.0 eV 

C) 2.7 eV 

D) 4.0 eV 

E) 6.0 eV

Answer 1

The correct option is: (A) 1.5 eV

Explanation:

From K = hf – ϕ … y = mx + b … the work function is the y intercept, extend the line.