Blue and red light are equally effective in photosynthesis but blue light is less efficient because

Options

A. It is fluorescent
B. It has lesser wavelength
C. A lot of energy is wasted in infrared radiations
D. It cannot bring photolysis of water and release of `O_(2)` along.

Answer

### Step-by-Step Solution:

1. **Understanding Photosynthesis**: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose. This process primarily occurs in the chloroplasts of plant cells.

2. **Role of Light in Photosynthesis**: Light is essential for photosynthesis, and different wavelengths of light can affect the efficiency of this process. The two key wavelengths discussed are blue light and red light.

3. **Chlorophyll Absorption**: The pigment chlorophyll, which is responsible for the green color of plants, absorbs light most efficiently in the red region of the spectrum. It does absorb some blue light, but not as effectively as red light.

4. **Efficiency of Blue Light**: Although blue light is effective for photosynthesis, it is considered less efficient than red light. This is because:
- Chlorophyll does not absorb blue light as effectively as red light.
- A significant amount of energy from blue light is lost as heat or through other processes rather than being used for photosynthesis.

5. **Photolysis of Water**: An important reaction in photosynthesis is the photolysis of water, which is the process where water molecules are split into oxygen, protons, and electrons using light energy. Blue light does not effectively drive this reaction on its own.

6. **Conclusion**: Therefore, while both blue and red light can be utilized in photosynthesis, blue light is less efficient due to its lower absorption by chlorophyll and its inability to independently facilitate the photolysis of water.

### Final Answer:
Blue and red light are equally effective in photosynthesis, but blue light is less efficient because it cannot bring about the photolysis of water and release oxygen alone.

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