Teaching HTET PGT Level 3 - 2024 Mock Test Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect
A metal surface is illuminated by a radiation of wavelength 4500 Å. The rejected photo-electron enters a constant magnetic field of 2 mT making an angle of 90° with the magnetic field. If it starts revolving in a circular path of radius 2 mm, the work function of the metal is approximately:
1
1.36 eV
2
1.69 eV
3
2.78 eV
4
2.23 eV