Question

Energy required to stop the ejection of electron from Cu plate is 0.24 eV. Calculate the work function when radiation of wavelength 253.7 nm strikes the plate.​

Answer 1

Answer:

4.65

Explanation:

Ep=hc/253.7

=7.834*10^-19J

=7.834*10^-19/1.6*10^-19

=4.89eV

Ep=KE+workfunction

4.89=0.24+workfunction

workfunction=4.89-0.24=4.65

Answer 2

Explanation:

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