What do you observe in the spectrum of NaCl ?

Explanation

To analyze the spectrum of NaCl (sodium chloride), we can break down the observations step by step.

### Step-by-Step Solution:

1. **Understanding the Spectrum**:
- The spectrum of NaCl is obtained when sodium chloride is excited, typically through heating or electrical discharge, causing it to emit light.

2. **Identifying Spectral Lines**:
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