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Chemistry · Structure of atom
हिन्दीWhat is the threshold frequency of radiation for caesium metal if its work function is \( 1.9 \text{ eV} \)? (Given \( h = 6.626 \times 10^{-34} \text{ J s} \))
Correct answer · Option 4
\( 4.59 \times 10^{14} \text{ s}^{-1} \)
Explanation
Work function \( W_0 = h\nu_0 \implies \nu_0 = \frac{1.9 \times 1.6 \times 10^{-19}}{6.626 \times 10^{-34}} = 4.59 \times 10^{14} \text{ s}^{-1} \).
