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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > What is the work function of the metal if the light of wavelength 4000Å generates photoelectrons of velocity 6×10^5 ms^-1 from it ? (Mass of electron =9×10^−31kg Velocity of light =3×10^8 ms^−1 Planck’s constant =6.626×10^−34Js Charge of electron =1.6×10^−19jeV^−1)

What is the work function of the metal if the light of wavelength 4000Å generates photoelectrons of velocity 6×10^5 ms^-1 from it ? (Mass of electron =9×10^−31kg Velocity of light =3×10^8 ms^−1 Planck’s constant =6.626×10^−34Js Charge of electron =1.6×10^−19jeV^−1)

The energy of electron in first energy level is - 21.79 × 10^-12 erg per atom. The energy of electron in second energy level is