alleryThe minimum energy needed for an electron to escape a metal is the:
AWave function
BWell function
CWatt function
DWork function
Answer & Solution
Correct answer: D. Work function
1. Electrons are held in the metal by an attractive pull.
2. The minimum energy required to escape the surface is the work function.
3. So the correct answer is work function.
_Source: syllabus Physics Part II, Ch 11 'Dual Nature of Radiation and Matter'_
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