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Question
Ultraviolet radiation of 6.2 eV falls on an aluminum surface (work function 4.2 eV). The kinetic energy in joules of the fastest electron emitted is ______
Options
3.2 × 10-21
3.2 × 10-19
3.2 × 10-1
3.2 × 10-15
Solution
Ultraviolet radiation of 6.2 eV falls on an aluminum surface (work function 4.2 eV). The kinetic energy in joules of the fastest electron emitted is 3.2 × 10-19.
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