The threshold wavelength for the ejection of electrons from the metal X is 330 nm. The work function for the photoelectric emission for metal X is `(h
The threshold wavelength for the ejection of electrons from the metal X is 330 nm. The work function for the photoelectric emission for metal X is `(h = 66 xx 10^(-34) Js)`
A. `1.2xx10^(-18) J`
B. `6.0xx10^(-19) J`
C. `1.2xx10^(-20) J`
D. `6.0xx10^(-22) J`
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Correct Answer - B
Work function is given as =`hv^@ =(hc)/lambda^@`
or Work function =`(6.62xx10^(-34)xx3xx10^8)/(330xx10^(-9))`
`=6xx10^(-19) J`
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