Fraunhofer's lines are mainly produced due to which phenomenon?

Answer

To answer the question regarding the phenomenon that produces Fraunhofer's lines, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fraunhofer's Lines**:
Fraunhofer's lines are dark lines that appear in the spectrum of sunlight. These lines correspond to specific wavelengths of light that are absorbed by elements in the sun's atmosphere.

2. **Identifying the Source of Light**:
The light that creates these lines originates from the inner atmosphere of the sun, which emits a continuous spectrum of light.

3. **Role of the Sun’s Atmosphere**:
The outer atmosphere of the sun contains various elements (like hydrogen, sodium, calcium, etc.) that absorb light at their characteristic wavelengths.

4. **Absorption of Light**:
When the sunlight passes through the outer layers of the sun, certain wavelengths of light are absorbed by these elements. This absorption leads to the appearance of dark lines in the spectrum.

5. **Conclusion**:
The phenomenon responsible for the production of Fraunhofer's lines is the absorption of specific wavelengths of light by elements in the sun's outer atmosphere.

### Final Answer:
Fraunhofer's lines are mainly produced due to the absorption of light by elements in the outer atmosphere of the sun.

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