A rainbow is formed in the sky after rain, which is due to
A rainbow is formed in the sky after rain, which is due to
_____________.
बारिश के बाद आकाश में इंद्रधनुष बनता है, जो __________ के कारण होता है।
Detailed Solution & Logic
refraction and dispersion of light by raindrops/ वर्षा की बूंदों द्वारा प्रकाश का अपवर्तन और परावर्तन
📘 Explanation
A rainbow is formed when sunlight interacts with raindrops present in the atmosphere after rain. The formation involves mainly three processes:
Refraction – Sunlight bends when it enters the raindrop.
Dispersion – White light splits into different colours because each colour has a different wavelength and bends differently.
Internal Reflection – The light reflects inside the raindrop and comes out again after refraction.
This combination produces the beautiful arc of seven colours seen in the sky.
📗 व्याख्या
बारिश के बाद वातावरण में मौजूद पानी की बूंदों से जब सूर्य का प्रकाश गुजरता है, तब इंद्रधनुष बनता है। इसमें मुख्य रूप से तीन प्रक्रियाएँ होती हैं:
अपवर्तन (Refraction) – प्रकाश बूंद में प्रवेश करते समय मुड़ जाता है।
वर्ण-विक्षेपण (Dispersion) – श्वेत प्रकाश अलग-अलग रंगों में विभाजित हो जाता है क्योंकि प्रत्येक रंग अलग मात्रा में मुड़ता है।
आंतरिक परावर्तन (Internal Reflection) – प्रकाश बूंद के अंदर परावर्तित होकर बाहर निकलता है।
इसी कारण आकाश में सात रंगों का इंद्रधनुष दिखाई देता है।
⭐ Extra Facts / अतिरिक्त तथ्य
🔹 VIBGYOR represents rainbow colours — Violet, Indigo, Blue, Green, Yellow, Orange, Red.
🔹 इंद्रधनुष हमेशा सूर्य के विपरीत दिशा में दिखाई देता है।
🔹 Red colour appears on the outer edge, while violet appears on the inner edge.
🔹 कभी-कभी double rainbow भी बनता है, जो बूंद के अंदर दो बार परावर्तन के कारण होता है।
🔹 A rainbow is actually a circular phenomenon, but from the ground we usually see only a semicircle.
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