A metal having work function of 2 eV is placed inside a magnetic field. Light of wavelength 400 nm is incident on this metal , and it is found that emitted electrons go around in circular paths . Maximum possible radius is found to be 25 cm . Find the magnitude of magnetic field strength.

Explanation

To solve the problem step by step, we will follow these steps:

### Step 1: Calculate the Energy of the Incident Light
The energy of the incident light can be calculated using the formula:
\[ E = \frac{hc}{\lambda} \]
Where:
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