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Q119 (CDS-I/2011) Geography › World Physical Geography › Earth rotation and time Answer Verified

Which one among the following statements is correct?

Result
Your answer: —  Â·  Correct: A
Explanation

The duration of daylight is primarily determined by the Earth's axial tilt (obliquity) as it orbits the Sun. During the summer season in the Northern Hemisphere, the North Pole is tilted toward the Sun [c2, t3]. This orientation causes the Sun's rays to fall more directly on the Northern Hemisphere, specifically the Tropic of Cancer, resulting in a larger portion of the hemisphere being illuminated [c2, t1]. Consequently, the duration of the day is longer than 12 hours, reaching its maximum at the summer solstice around June 21st, which is the longest day of the year in the Northern Hemisphere [c1, t8]. Conversely, during the winter season, the Northern Hemisphere is tilted away from the Sun, leading to shorter days [c3, t4]. While the Southern Hemisphere also experiences longer days during its own summer (December), the specific phrasing of option 1 correctly describes the Northern Hemisphere's summer condition [c2, c4].

Sources

  1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 12: Earth, Moon, and the Sun > 12.2.2 Seasons on the Earth > p. 179
  2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 19: The Motions of The Earth and Their Effects > Summer Solstice > p. 252
  3. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 19: The Motions of The Earth and Their Effects > Winter Solstice > p. 253
  4. [4] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 2: The Earth's Crust > The Earth's Revolution > p. 7
  5. [5] https://en.wikipedia.org/wiki/Daytime
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