Question #79691
If the threshold wavelength for photoelectric effect on sodium metal is 5000A0, find its work function.
Expert's answer
We can find the work function of the sodium metal from the formula:
W_0=hf_0=hc/λ_0 =(6.626∙〖10〗^(-34) J∙s∙3.0∙〖10〗^8 m/s)/(5000∙〖10〗^(-10) m)==4.0∙〖10〗^(-19) J∙(1 eV)/(1.6∙〖10〗^(-19) eV)=2.5 eV.
W_0=hf_0=hc/λ_0 =(6.626∙〖10〗^(-34) J∙s∙3.0∙〖10〗^8 m/s)/(5000∙〖10〗^(-10) m)==4.0∙〖10〗^(-19) J∙(1 eV)/(1.6∙〖10〗^(-19) eV)=2.5 eV.
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#339914 on Dec 2023
#339914 on Dec 2023