A Metal Has a Work Function Of $4.50 \mathrm { eV }$

question 135

Multiple Choice

A metal has a work function of $4.50 \mathrm { eV }$ . Find the maximum kinetic energy of the photoelectrons if light of wavelength $250 \mathrm {~nm}$ shines on the metal. $\left( 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J} , c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \right.$ × $10 ^{- 34} \mathrm {~J} \cdot \mathrm { s }$ )

• A) \(0.47 \mathrm { eV }\)
• B) \(0.37 \mathrm { eV }\)
• C) \(0.53 \mathrm { eV }\)
• D) \(0.00 \mathrm { eV }\)

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