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Question

The energy required to eject an electron from a metal is 4.5 × 10⁻¹⁹ J. If light of frequency 8.0 × 10¹⁴ Hz is used, what is the kinetic energy of the ejected electron? (h = 6.626 × 10⁻³⁴ J s)

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Explanation

E ≈ 5.301×10⁻¹⁹ J. KE ≈ 8.008×10⁻²⁰ J.

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