The percentage of blue and red wavelengths of light absorbed by chlorophyll a is

Options

A. `40%:4%`
B. `45%:25%`
C. `48%:20%`
D. `40%:30%`

Answer

To determine the percentage of blue and red wavelengths of light absorbed by chlorophyll a, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Wavelengths**:
- Chlorophyll a absorbs light primarily in the violet, blue, and red regions of the light spectrum. It reflects green light.

2. **Understand Absorption Characteristics**:
- Chlorophyll a has specific absorption peaks. It absorbs blue light (around 430-450 nm) and red light (around 640-680 nm).

3. **Quantify Absorption**:
- Research indicates that chlorophyll a absorbs approximately 30% of blue light and about 60% of red light.

4. **Calculate Total Absorption**:
- To find the total percentage of blue and red light absorbed by chlorophyll a, we can add the absorption percentages together:
- Blue light absorption: 30%
- Red light absorption: 60%
- Total absorption = 30% (blue) + 60% (red) = 90%

5. **Conclusion**:
- Therefore, the percentage of blue and red wavelengths of light absorbed by chlorophyll a is approximately 90%.

### Final Answer:
The percentage of blue and red wavelengths of light absorbed by chlorophyll a is approximately 90%.

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