The Work Function of Sodium Is $\phi$ = 290 $\times$ 10^-19 J

question 28

Multiple Choice

The work function of sodium is $\phi$ = 2.90 $\times$ 10^-19 J.What is the maximum wavelength that can cause ejection of photoelectrons from a sodium surface?

• A)151 nm
• B)222 nm
• C)45.1 nm
• D)451 nm
• E)685 nm

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