A metal exposed to light of wavelength 800 nm and emits photoelectrons with a certain kinetic energy. The maximum kinetic energy of photo-electron doubles when light of wavelength 500 nm is used. The work function of the metal is (Take he = 1230 eV-nm).
Text Solution
Verified by ExpertsThe correct answer is:
C
… (1)
… (2)
Eliminating k 1 from (1) and (2) we get
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