The short-wavelength limit shifts by 26 pm when the operating voltage in an X-ray tube is increased to 1.5 times the original value. What was the original value of the operating voltage?

Explanation

To solve the problem, we need to find the original operating voltage (V) of the X-ray tube given that the short-wavelength limit shifts by 26 pm when the operating voltage is increased to 1.5 times its original value.

### Step-by-Step Solution:

1. **Understand the Relationship**: The energy of the X-rays produced in an X-ray tube is related to the operating voltage (V) and the wavelength (λ) by the equation:
\[ E = \frac{hc}{\lambda} \]
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