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The radiation emitted when an electron jumps from n=4 to n=3 in a Li++ ion (atomic no. Z=3 ) falls on a metal surface to produce photoelectron. When the photoelectron with maximum kinetic energy is made to move perpendicular to a uniform magnetic field of 2×10−4 T, it follows a circular path of radius √9.11.6 cm. The work function of metal (in eV ) is (given mass of electron m=9.1×10−31 kg and charge on electron=−1.6×10−19 C |
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Answer» The radiation emitted when an electron jumps from n=4 to n=3 in a Li++ ion (atomic no. Z=3 ) falls on a metal surface to produce photoelectron. When the photoelectron with maximum kinetic energy is made to move perpendicular to a uniform magnetic field of 2×10−4 T, it follows a circular path of radius √9.11.6 cm. The work function of metal (in eV ) is (given mass of electron m=9.1×10−31 kg and charge on electron=−1.6×10−19 C |
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