Radiation, with wavelenght 651 Å falls o...

Radiation, with wavelenght `651 Å` falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of `3 xx 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:

`0.8 eV`

`1.1 eV`

`1.6 eV`

`1.8 eV`

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