Light of wavelength 600 nm is incident on potassium (work function 2.3 eV). Will photoemission of electrons occur? What is the longest wavelength…

E = hc/(λ) = (1240 eV nm)/(600 nm) = 2.06 eV Work function φ 0 = 2.3 eV E < φ 0 No emission will take place. λ max = hc/(φ) = (1240 eV nm)/(2.3 eV) λ max = 539.13 nm

CBSE 2024 · Region 3 · Set 3 · Q20 · 2 marks

Light of wavelength $\displaystyle 600$ nm is incident on potassium (work function $\displaystyle 2.3 \mathrm{eV})$. Will photoemission of electrons occur ? What is the longest wavelength that will cause photoemission of electrons? (Take hc $\displaystyle =1240 \mathrm{eV} . \mathrm{nm}$ )

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Light of wavelength $\displaystyle 600$ nm is incident on potassium (work function $\displaystyle 2.3 \mathrm{eV})$. Will photoemission of electrons occur ? What is the longest wavelength that will cause photoemission of electrons? (Take hc $\displaystyle =1240 \mathrm{eV} . \mathrm{nm}$ )

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