If work function of a metal is 4.2 eV, the cut-off wavelength is

Chemistry · NEET · NTA Exams — Structure of Atom

1. 8000 \(\stackrel{a}{A}\)
2. 7000 \(\stackrel{a}{A}\)
3. 1472 \(\stackrel{a}{A}\)
4. 2950 \(\stackrel{a}{A}\)

Answer

(D) 2950 a A

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