Under which condition does chlorophyll a molecule change from the ground state to the excited state?

Explanation

To answer the question "Under which condition does chlorophyll a molecule change from the ground state to the excited state?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chlorophyll**:
- Chlorophyll is a green pigment found in plants, primarily responsible for the absorption of light energy during photosynthesis.

2. **Ground State of Chlorophyll**:
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