Electrons are emitted from the cathode of a photocell of negligible work function, when photons of wavelength `lamda` are incident on it. Derive the expression for the de Broglie wavelength of the electrons emitted in terms of the wavelength of the incident light

Explanation

To derive the expression for the de Broglie wavelength of the electrons emitted from a photocell when photons of wavelength \( \lambda \) are incident on it, we can follow these steps:

### Step 1: Understand the Photoelectric Effect
In the photoelectric effect, when light (photons) strikes a material, it can cause the emission of electrons. The energy of the incident photons can be calculated using the formula:
\[ E = \frac{hc}{\lambda} \]
where:
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