Find the frequency of light which ejects electrons from a metal surface , fully stopped by a retarding potential of 3.3 V. If photo electric emission begins in metal at a frequency of `8xx10^(14)Hz`, calculate the work function (in eV) for this metal.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the problem
We need to find the frequency of light that can eject electrons from a metal surface, which are then fully stopped by a retarding potential of 3.3 V. We also need to calculate the work function of the metal given that photoelectric emission begins at a frequency of \(8 \times 10^{14} \text{ Hz}\).

### Step 2: Use Einstein's photoelectric equation
According to Einstein's photoelectric equation, the energy of the incident light is given by:
\[
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