Indicate Which of the Following Photons Can Cause the Emission $\varPhi$

question 3

Multiple Choice

Indicate which of the following photons can cause the emission of photoelectrons from a surface of gallium ( $\varPhi$ = 6.7 * 10^-19 J) .

• A)350 nm
• B)400 nm
• C)200 nm
• D)650 nm
• E)500 nm

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