Which colour of light gives maximum absorption peak of chlorophyll a

Options

A. Red
B. Blue
C. green
D. Yellow

Answer

**Step-by-Step Solution:**

1. **Understanding Light and Its Spectrum:**
- Light is a form of electromagnetic radiation that travels in waves. The electromagnetic spectrum includes various types of radiation, which can be categorized based on their wavelengths.

2. **Identifying the Visible Spectrum:**
- The visible spectrum is the portion of the electromagnetic spectrum that can be seen by the human eye. It ranges from approximately 400 nanometers (nm) to 700 nm.

3. **Recognizing Types of Chlorophyll:**
- There are several types of chlorophyll, including chlorophyll A, B, C, D, and bacteriochlorophyll. Each type has different absorption characteristics.

4. **Determining the Absorption Peaks of Chlorophyll A:**
- Chlorophyll A has specific wavelengths at which it absorbs light most effectively. The maximum absorption peak for chlorophyll A is found in the blue light range.

5. **Identifying the Wavelength Range for Maximum Absorption:**
- The blue light range for chlorophyll A is approximately between 425 nm and 450 nm. This is where chlorophyll A shows its highest absorption peak.

6. **Comparing Other Light Absorption:**
- While chlorophyll A absorbs blue light most effectively, it also absorbs red light (600 nm to 700 nm) but to a lesser extent. Green light is poorly absorbed and is mostly reflected, which is why plants appear green.

7. **Conclusion:**
- The color of light that gives the maximum absorption peak of chlorophyll A is blue light.

**Final Answer:**
The color of light that gives the maximum absorption peak of chlorophyll A is blue light.

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