Light with a Frequency Of $8.70 \times 1014 \mathrm {~Hz}$ Is Incident on a Metal That Has a Work Function

question 39

Multiple Choice

Light with a frequency of $8.70 \times 1014 \mathrm {~Hz}$ is incident on a metal that has a work function of $2.80 \mathrm { eV }$ . What is the maximum kinetic energy that a photoelectron ejected in this process can have? $( 1 \mathrm { eV } =$ $\left. 1.60 \times 10 ^ { - 19 } \mathrm {~J} , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

• A) \(1.3 \times 10 ^ { - 19 } \mathrm {~J}\)
• B) \(4.5 \times 10 ^ { - 19 } \mathrm {~J}\)
• C) \(8.7 \times 10 ^ { - 19 } \mathrm {~J}\)
• D) \(2.4 \times 10 ^ { - 19 } \mathrm {~J}\)
• E) \(3.1 \times 10 ^ { - 19 } \mathrm {~J}\)

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