In bacteria , the wavelength of light that is required to carry out photosynthesis is

Options

A. Ultraviolet light
B. Blue
C. Red
D. Far red

Answer

To solve the question regarding the wavelength of light required for photosynthesis in bacteria, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Photosynthesis in Bacteria**:
- Photosynthesis in bacteria occurs using different pigments compared to plants. Bacteria can utilize a broader spectrum of light for photosynthesis.

2. **Identify Key Wavelengths**:
- In plants, the key wavelengths involved in photosynthesis are associated with photosystems, specifically P700 (around 700 nm) and P680 (around 680 nm).

3. **Explore Bacterial Photosynthesis**:
- Bacteria, particularly photosynthetic bacteria, can absorb light in wavelengths beyond those utilized by plants. They can utilize light in the far-red spectrum.

4. **Determine the Wavelength Range**:
- The far-red light is defined as the wavelength range from 700 nm to 800 nm. This is crucial for the photosynthetic process in certain bacteria.

5. **Conclusion**:
- Therefore, the wavelength of light that is required for photosynthesis in bacteria primarily falls within the far-red range, specifically from 700 nm to 800 nm.

### Final Answer:
The wavelength of light that is required to carry out photosynthesis in bacteria is primarily in the range of 700 to 800 nanometers (far-red light).

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