Categories > Dual Nature of Radiation and Matter > Photon and Photoelectric Effect > When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are $v$ and $2v$ respectively. The work function of the metal is (h = Planck’s constant, c = velocity of light in air)

Dual Nature of Radiation and Matter

Question: When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are $v$ and $2v$ respectively. The work function of the metal is (h = Planck’s constant, c = velocity of light in air)


1) $2\,hc\, \times {10^6}\,J$
2) $1.5\,hc\, \times {10^6}\,J$
3) $hc\, \times {10^6}\,J$
4) $0.5\,\,hc\, \times {10^6}\,J$
Solution: Explanation: No Explanation
Photon and Photoelectric Effect

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