The electric field associated with a light wave is given by `E= E_0 sin [(1.57x 10^7 m^(-1)(x-ct)].` Find the stopping potential when this light is used in an experiment on photoelectric affect with a metal having work - function 1.9 eV.
A. `1.2 V`
B. `1.1 V`
C. `2 V`
D. `2.1 V`