AP Physics 2mediummcq1 pt
A metal has work function 4.0 eV. A photon must have at least what energy to eject electrons?
A.4.0 eV
B.2.0 eV
C.8.0 eV
D.0 eV
Explanation
Core Concept
The work function is the minimum required photon energy.
Correct Answer
A4.0 eV
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