Find the cut off wavelength for the continuous X - rays coming from an X-ray tube operating at 40 kV.

Explanation

To find the cut-off wavelength for the continuous X-rays coming from an X-ray tube operating at 40 kV, we can follow these steps:

### Step 1: Understand the formula for cut-off wavelength
The cut-off wavelength (λ_min) for X-rays can be calculated using the formula:
\[ \lambda_{\text{min}} = \frac{12375}{V} \]
where \( V \) is the operating potential in volts.
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