Correct Answer: Option A

Explanation

E = hf + W\(_o\)

E = 1.12 x 10\(^{-18}\)J

Max. Energy = 8.0 x 10\(^{-19}\)J.

W\(_o\) = E - Max. Energy  = 1.12 x 10\(^{-18}\)J - 8.0 x 10\(^{-19}\)J. = 3.2 x 10\(^{-19}\)J.

But W\(_o\) = hf\(_o\)

f\(_o\) = \(\frac{W_o}{h}\) = \(\frac{3.2 \times 10^{-19}}{6.626 \times 10^{-34}}\) = 4.83 x 10\(^{14}\)Hz

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