Calculate the de Broglie wavelength of (a) a 2.00 keV electron, (b) a 2.00 keV photon, and (c) a 2.00 keV neutron.

Explanation

To calculate the de Broglie wavelength for a 2.00 keV electron, photon, and neutron, we will follow these steps:

### Step 1: Calculate the de Broglie wavelength of a 2.00 keV electron.

1. **Convert the kinetic energy from keV to joules**:
\[ KE = 2.00 \, \text{keV} = 2.00 \times 10^3 \, \text{eV} = 2.00 \times 10^3 \times 1.6 \times 10^{-19} \, \text{J} = 3.2 \times 10^{-16} \, \text{J} \]
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