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  4. The threshold frequency of potassium is 3 × 1014 Hz. The work function is

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Q. The threshold frequency of potassium is $3 \times 10^{14}$ Hz. The work function is

Dual Nature of Radiation and Matter

Solution:

$\omega= hf = 6.6 \times 10^{-34} \times 3 \times 10^{14} = 2 \times 10^{-19} \, J$