Physics · Dual Nature of Matter and Radiation
A light beam of wavelength 500 nm is incident on a metal having work function of 1.25 eV, placed in a magnetic field of intensity B. The electrons emitted perpendicular to the magnetic field B, with maximum kinetic energy are bent into a circular arc of radius 30 cm. The value of B is ___________ × 10-7 T. (Given hc = 20 × 10-26 J m, the mass of the electron = 9 × 10-31 kg)
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