Physics · Thermodynamics
गर्मियों में सौर विकिरण (धूप) से बचने के लिए छाते में निम्नलिखित में से कौन सा रंग संयोजन सबसे उपयुक्त है?
- 1दोनों तरफ सफेद
- 2दोनों तरफ काला
- 3ऊपर सफेद, नीचे काला✓
- 4ऊपर काला, नीचे सफेद
सही उत्तर देखें
ऊपर सफेद, नीचे काला
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