Calculate the minimum wavelength emitted by an X-ray tube which is operated at a potential difference of 20 kV.

Explanation

To calculate the minimum wavelength emitted by an X-ray tube operated at a potential difference of 20 kV, we can use the relationship between energy and wavelength derived from Planck's quantum theory. Here’s a step-by-step solution:

### Step 1: Understand the relationship
The energy (E) of a photon is related to its wavelength (λ) by the equation:
\[ E = \frac{hc}{\lambda} \]
Where:
- \( h \) is Planck's constant (\( 6.63 \times 10^{-34} \, \text{Js} \))
- \( c \) is the speed of light (\( 3 \times 10^{8} \, \text{m/s} \))
...