Rate of phosynthesis is higher in

Options

A. Very high light
B. Red light
C. Green light
D. Continuous light.

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water. Light is a crucial factor in this process.

2. **Identifying the Wavelengths of Light**: The light spectrum that is effective for photosynthesis is known as the Photosynthetically Active Radiation (PAR), which ranges from approximately 400 to 700 nanometers. This range includes various colors of light.

3. **Analyzing Different Light Colors**: Among the colors of light, red light (around 600-700 nm) is particularly effective for photosynthesis. This is because chlorophyll, the green pigment in plants, absorbs red light more efficiently than other wavelengths.

4. **Comparing Light Colors**:
- **Red Light**: Maximum absorption by chlorophyll, leading to a higher rate of photosynthesis.
- **Green Light**: Least absorbed by chlorophyll, which is why plants appear green. This results in a lower rate of photosynthesis.
- **High Light Intensity**: While high light intensity can enhance photosynthesis, it is the specific wavelength that plays a crucial role.
- **Continuous Light**: Continuous light can also enhance photosynthesis, but the quality of light (wavelength) is more important.

5. **Conclusion**: Based on the absorption characteristics of chlorophyll, the rate of photosynthesis is highest in red light. Therefore, the correct answer to the question is **red light**.

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