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

Explanation

To solve the problem, we will follow these steps:

### Step 1: Identify the given parameters
We have the electric field of the light wave given by:
\[ E = E_0 \sin(1.57 \times 10^7 \, \text{m}^{-1} (x - ct)) \]
We also know the work function (\( \phi \)) of the metal is 1.9 eV.

### Step 2: Determine the angular frequency (\( \omega \))
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