The distance between the cathode (filament) and the target in an X-ray tube is 1.5 m. If the cutoff wavelength is 30 pm, find the electric field between the cathode and the target.

Explanation

To solve the problem, we need to find the electric field between the cathode and the target in an X-ray tube given the distance and the cutoff wavelength.

### Step-by-Step Solution:

1. **Identify the given values:**
- Distance between cathode and target, \( d = 1.5 \, \text{m} \)
- Cutoff wavelength, \( \lambda_{\text{min}} = 30 \, \text{pm} = 30 \times 10^{-12} \, \text{m} \)

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