Which of the following statements related to green light is correct ?

Options

A. The atmosphere filters out all the colours of the visible light spectrum except green .
B. The green light is the most effective wavelength region of the visible spectrum in sunlight for photosynthesis
C. Chorophyll is least effective in absorbing green light
D. The green light allows maximum photosynthesis

Answer

To solve the question regarding which statement related to green light is correct, we can follow these steps:

### Step 1: Understand Green Light
Green light is part of the visible light spectrum, with a wavelength of approximately 550 nanometers. It plays a role in photosynthesis, but its effectiveness is limited compared to other wavelengths.

**Hint:** Remember that the visible spectrum includes various colors, and each color has a specific wavelength.

### Step 2: Analyze the Statements
Now, we will evaluate each statement provided in the question to determine its correctness.

1. **Statement 1:** "The atmosphere filters out all the colors of the visible light spectrum except green."
- This statement is incorrect. The atmosphere does filter light, but it does not exclusively allow green light to pass through while blocking all others.

**Hint:** Consider how the atmosphere interacts with different wavelengths of light.

2. **Statement 2:** "The green light is the most effective wavelength region for photosynthesis."
- This statement is also incorrect. Green light is not the most effective for photosynthesis; in fact, it is less effective than blue and red light.

**Hint:** Recall the role of different wavelengths in photosynthesis and which are most effective.

3. **Statement 3:** "Chlorophyll is least effective in absorbing green light."
- This statement is correct. Chlorophyll absorbs blue and red light more effectively than green light, making it least effective in absorbing green light.

**Hint:** Think about the absorption spectrum of chlorophyll and which colors it absorbs best.

4. **Statement 4:** "The green light allows maximum photosynthesis."
- This statement is incorrect. As previously mentioned, green light is not very effective for photosynthesis compared to other wavelengths.

**Hint:** Reflect on the relationship between light absorption and photosynthesis efficiency.

### Step 3: Conclusion
After analyzing all the statements, we find that the correct statement is: **"Chlorophyll is least effective in absorbing green light."** Therefore, the answer is option C.

**Final Answer:** Option C: Chlorophyll is least effective in absorbing green light.