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Assertion (A): Sun appears reddish at the time of Sunrise and Sunset.

Reason (R): Distance travelled by sunlight in the atmosphere is lesser during sunrise and sunset as compared to noon.

  1. Both A and R are true, and R is the correct explanation of A.
  2. Both A and R are true, and R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.

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Answer

A is true and R is false.

Reason — During the sunrise and sunset, the sun is near the horizon and most of the blue light and shorter wavelengths are scattered away by the particles. Therefore, the light that reaches our eyes is of longer wavelength. This gives rise to the reddish appearance of the sun.

During sunrise and sunset, sun is at a farther distance while at noon sun is directly overhead. Hence, distance travelled by sunlight in the atmosphere is more during sunrise and sunset as compared to noon.

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