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UPSC 2002: Sun’s halo is produced by the refraction of light in
(a)Water vapour, in Stratus clouds
(b)Ice crystals in Cirrocumulus clouds
(c)Ice crystals in Cirrus clouds
(d)Dust particles in Stratus clouds
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Not attemptedCorrect Answer: (c) Ice crystals in Cirrus clouds
A 22-degree solar halo forms when sunlight is refracted (and partly reflected) through hexagonal ice crystals suspended in high-level cirrus/cirrostratus clouds. Water-droplet stratus clouds or dust lack the required oriented ice prisms, so they cannot produce the characteristic bright ring. ([timesofindia.indiatimes.com](https://timesofindia.indiatimes.com/city/nagpur/stunning-solar-halo-graces-sky-over-vidarbha-as-ice-crystals-create-magic/articleshow/121324142.cms?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2002 Geography question?▼
The correct answer is option (c): Ice crystals in Cirrus clouds. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Atmosphere & Climatology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2002, GS Paper 1, as Question 56. It falls under Geography > Atmosphere & Climatology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Atmosphere & Climatology?▼
UPSC has asked 70 questions from Atmosphere & Climatology (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.