Light of wavelength 450 nm is incident on a metal , and it is found that negative potential of 1 V is needed to stop the photocurrent completely. What is the threshold wavelength of the material ?

Explanation

To solve the problem, we need to find the threshold wavelength of the material given the incident light's wavelength and the stopping potential. Here's a step-by-step breakdown of the solution:

### Step 1: Understand the Problem
We are given:
- Wavelength of incident light, \( \lambda = 450 \, \text{nm} \)
- Stopping potential, \( V = 1 \, \text{V} \)

We need to find the threshold wavelength \( \lambda_0 \) of the material.
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