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Per NCERT eqn 2.7, Einstein's photoelectric equation gives the kinetic energy of an ejected electron as which expression?
A½ m_e v² = h ν − h ν₀ = h(ν − ν₀)
B½ m_e v² = h ν × h ν₀
C½ m_e v² = h ν + h ν₀
D½ m_e v² = h ν / ν₀
Answer & Solution
Correct answer: A. ½ m_e v² = h ν − h ν₀ = h(ν − ν₀)
Per NCERT eqn 2.7, K.E. = hν − hν₀ where ν₀ is the threshold frequency and hν₀ = work function W₀.
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