Why do submerged plants receive weaker illumination than exposed floating plants in a lake?

Explanation

### Step-by-Step Solution:

1. **Understanding the Environment**:
- Submerged plants grow underwater, while floating plants are above the water surface. This difference in location affects their exposure to light.

2. **Light Penetration in Water**:
- Light consists of various colors, which are part of the visible spectrum. When light enters water, it does not penetrate to great depths effectively. The intensity of light decreases as it travels through water.

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