Question
Light of wavelength 5000oA falls on a sensitive plate with photo electric work function 1.9eV. The kinetic energy of the photo electrons emitted will be:
Light of wavelength 5000oA falls on a sensitive plate with photo electric work function 1.9eV. The kinetic energy of the photo electrons emitted will be:
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Solution
The correct option is A 0.58eV.
From photoelectric equationKE=hcλ−W6.6×10−34×3×1085000×10−10−1.9×1.6×10−19=0.58eV
From photoelectric equation
KE=hcλ−W6.6×10−34×3×1085000×10−10−1.9×1.6×10−19=0.58eV
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