Why is lumen of thylakoids is acidic and stroma is alkaline in nature ?

Explanation

To understand why the lumen of thylakoids is acidic while the stroma is alkaline, we can break down the explanation into several key steps:

### Step-by-Step Solution:

1. **Understanding Thylakoids and Stroma**:
- Thylakoids are membrane-bound structures within chloroplasts where the light-dependent reactions of photosynthesis occur. The stroma is the fluid-filled space surrounding the thylakoids.

2. **Role of Light Reactions**:
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