On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 h

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UPSC Prelims is a competitive examination conducted in India. This question is from the 2024 UPSC Prelims Geography paper.

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Question

On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 hours?EquatorTropic of CancerTropic of CapricornArctic CircleSelect the correct answer using the code given below:

Accepted Answer

Correct Answer: D  2 and 4 (Tropic of Cancer and Arctic Circle)Step-by-step Solution:June 21 is the Summer Solstice in the Northern Hemisphere  the day when the Northern Hemisphere is tilted maximally toward the Sun, with the Sun's rays falling vertically on the Tropic of Cancer (23.5°N).Latitude 1  Equator (0°): At the equator, day and night are approximately equal throughout the year  each roughly 12 hours. On June 21, the equator experiences exactly 12 hours of daylight (not MORE than 12 hours). ✗ (Exactly 12, not more than 12)Latitude 2  Tropic of Cancer (23.5°N): On June 21, the Sun is directly overhead at noon at the Tropic of Cancer. This latitude receives the maximum possible sun angle in the Northern Hemisphere on this date. The day length is approximately 13.5 hours  significantly more than 12 hours. ✓Latitude 3  Tropic of Capricorn (23.5°S): The Tropic of Capricorn is in the Southern Hemisphere. On June 21, the Southern Hemisphere is tilted away from the Sun  it is winter solstice in the Southern Hemisphere. The Tropic of Capricorn experiences approximately 10.5 hours of daylight  less than 12 hours. ✗Latitude 4  Arctic Circle (66.5°N): On June 21, the Arctic Circle experiences the Midnight Sun  a full 24 hours of daylight. Any location at or north of the Arctic Circle (66.5°N) receives continuous sunlight on the summer solstice. This is certainly more than 12 hours. ✓Tropic of Cancer (>12 hrs) and Arctic Circle (24 hrs)  both experience more than 12 hours of sunlight on June 21.Why other options are incorrect:Option A (1 only  Equator): Incorrect. The equator gets exactly 12 hours, not more than 12.Option B (2 only): Incorrect. The Arctic Circle also gets more than 12 hours (24 hours) on June 21.Option C (3 and 4): Incorrect. Tropic of Capricorn gets less than 12 hours on June 21 (Southern Hemisphere winter); Arctic Circle does get more than 12 hours but Tropic of Capricorn does not.Key Concept: Day length variation with latitude and season: Equator: Always ~12 hours day and night throughout the year. Northern Hemisphere summer (June 21  Summer Solstice): North of equator  days > 12 hours; more so as latitude increases; Arctic Circle (66.5°N)  24 hours daylight (Midnight Sun); North Pole  6 months of continuous daylight; Tropic of Cancer  ~13.5 hours. Southern Hemisphere on June 21 (Winter Solstice): South of equator  days

On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 hours?EquatorTropic of CancerTropic of CapricornArctic CircleSelect the correct answer using the code given below:

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On June 21 every year, which of the following latitude(s) experience(s) a sunlight of more than 12 hours?EquatorTropic of CancerTropic of CapricornArctic CircleSelect the correct answer using the code given below:

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