find the maximum wavelength of electromagnetic radiation which can create a hole-electron pair in germanium.The band gap in germanium is 0.65eV.

Explanation

To find the maximum wavelength of electromagnetic radiation that can create a hole-electron pair in germanium, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Values**:
- The band gap energy (E) of germanium is given as 0.65 eV.

2. **Use the Energy-Wavelength Relationship**:
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