When It Is Struck by 240-Nm Photons, a Metal Ejects $2.58 \mathrm { eV }$

question 23

Multiple Choice

When it is struck by 240-nm photons, a metal ejects electrons with a maximum kinetic energy of $2.58 \mathrm { eV }$ What is the work function of this material? (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ? s, 1 eV = 16.0 × 10^-19 J)

• A)2.60 eV
• B)2.18 eV
• C)3.02 eV
• D)3.43 eV

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