The X-ray coming from a Coolidge tube has a cutoff wavelength of 80 pm. Find the kinetic energy of the electrons hitting the target.

Explanation

To find the kinetic energy of the electrons hitting the target in a Coolidge tube when the cutoff wavelength of the X-rays is given as 80 pm (picometers), we can follow these steps:

### Step 1: Understand the relationship between energy and wavelength
The energy (E) of a photon is related to its wavelength (λ) by the equation:
\[ E = \frac{hc}{\lambda} \]
where:
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