When a surface is irradiated with light of wavelength

PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

4950\,\text{\AA}

, a photocurrent appears that vanishes if a retarding potential greater than

0.6\,\text{V}

is applied across the phototube. When a second source of light is used, the critical retarding potential changes to

1.1\,\text{V}

. If the photoelectrons, after emission from the source, are subjected to a magnetic field of

10\,\text{T}

, the two retarding potentials would (1) uniformly increase (2) uniformly decrease (3) remain the same (4) None of these