PhysicsRising and setting sun appears to be reddish because:

Rising and setting sun appears to be reddish because:


  1. A
    The sun is colder at sunrise or at sunset
  2. B
    Diffraction sends red rays to the earth at these times
  3. C
    Refraction is responsible for it
  4. D
    Scattering due to dust particles and air molecules is responsible for it 

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    Solution:

    Concept- Remember the reason the sky seems blue during the day. Recall the idea of light scattering. Review the terms and ideas for scattering, refraction, and diffraction.
    During the sunrise and sunset, the rays have to travel long distances as the Sun is near the horizon. While all the other rays (having shorter wavelength) get scattered more, red, having the longest wavelength gets scattered the least and therefore, travel the distance reaching our eyes, thus, making the sun look red.
    Hence, option 4 is correct.
     
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