Radiation, with wavelength 6561 $\mathop A\limits^o $ falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 × 10–4 T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to :

Question

Radiation, with wavelength 6561 $\mathop A\limits^o $ falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 × 10^–4 T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to :

1.8eV

0.8eV

1.1eV

1.6eV

Solution

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