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Light with wavelegth 400 nanometers strikes a metal surface such that electrons are ejected with a...

Light with wavelegth 400 nanometers strikes a metal surface such that electrons are ejected with a maximum kinetic energy 2.13 x 10-19 Joules. Calculate the work function of this metal in electron volts.

2.0 eV

1.7 eV

not enough information

2.8 eV

3.3 eV

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