The reddening of the sum at sunrise is due to :

Options

A. Accomodation
B. Scattering
C. Dispersion
D. Reflection

Answer

**Step-by-Step Solution:**

1. **Understanding the Phenomenon**: The question asks why the sun appears reddish at sunrise. This phenomenon is commonly observed and can be explained through the interaction of sunlight with the Earth's atmosphere.

2. **Identifying the Factors**: The options provided include accommodation, scattering, dispersion, and reflection. We need to analyze which of these factors contributes to the reddening of the sun.

3. **Analyzing Accommodation**: Accommodation refers to the ability of the human eye to change its focal length to see objects at different distances. This phenomenon does not relate to the color change of the sun, so it can be ruled out.

4. **Considering Scattering**: Scattering occurs when particles in the atmosphere interact with sunlight. The Earth's atmosphere contains various particles, including dust and water droplets, that can scatter light.

5. **Understanding Light Scattering**: Sunlight is composed of different colors, which can be scattered differently. Blue light has a shorter wavelength and is scattered more than red light, which has a longer wavelength. During sunrise, sunlight passes through a thicker layer of the atmosphere, which leads to more scattering of blue light.

6. **Conclusion on Scattering**: As the blue light is scattered out of the direct path of sight, the remaining light that reaches our eyes is predominantly red. This is why the sun appears reddish at sunrise.

7. **Ruling Out Other Options**: Dispersion refers to the splitting of light into its constituent colors, which does not apply in this context. Reflection is also not relevant to the reddening of the sun at sunrise.

8. **Final Answer**: Therefore, the correct answer to the question is that the reddening of the sun at sunrise is due to scattering.

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