Find out the longest wave length of light just able to eject a least bound electron from copper ( work function = 4.3 ev
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hc/k = 4.3 + K.E
take K.E. = 0
(for longest wavelength)
therfore,
k = hc/4.3 = 1240/4.3 = 288.3872 nm
I HOPE THIS ANSWER IS HELPFULL FOR YOU.
take K.E. = 0
(for longest wavelength)
therfore,
k = hc/4.3 = 1240/4.3 = 288.3872 nm
I HOPE THIS ANSWER IS HELPFULL FOR YOU.
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