Find the frequency of light incident on a metal surface if the photocurrent is brought to zero by a stopping potential of `2.6V`. The threshold frequency for the metal surface is `5xx10^(14)//s` .

Explanation

To solve the problem, we will use the photoelectric equation, which relates the energy of the incident light to the work function of the metal and the kinetic energy of the emitted electrons.

### Step-by-Step Solution:

1. **Understand the Photoelectric Equation**:
The photoelectric equation is given by:
\[
K.E. = h \nu - \phi
...