अक्षांश और देशान्तर
akshaanseey rekhayein aur unake madhy doori (Latitudinal Lines and Distance Intervals)
📖 Core Summary: Prithvi par kshaitij roop se kheechee gayee kaalpanik rekhaayein akshaansh (Latitudes) kahalaatee hain, jo sthaan vishesh ki koomeey doori ko darshaatee hain.
📌 Key Facts & Historical Provisions
- Do kramik akshaanshon ke beech kee vaastavik bhaugolik doori lagbhag 111 kilometer (111 km) hoti hai.
- Bhooghumadhya rekha (Equator/0°) se dhruvon (90° N/S) ki aur jaane par akshaanseey rekhaon ke beech ki doori mein aamtaur par 1-2 km ka sookshm antar aata hai.
- Kkul akshaanshon ki sankhya 181 hoti hai (agar 0° bhhooghumadhya rekha ko shamil kiya jaaye) ya phir rekhayon ke roop mein 179.
💡 Memory Hook (Mnemonic): 'AK-111' yaad rakhein: Akshaansh ki 1 degree ki doori hamesha 111 km hoti hai.
⚠️ Exam Pointers & Traps: UPSC mein aksar ye bhranti failaayee jaati hai ki sabhi akshaansh rekhaon ki lambaai samaan hoti hai, jabki dhyan rahe ki keval Equator sabse lambee rekha hai aur dhruvon ki taraf jaane par ye chhoti hoti jaatee hain.
🎯 Mini Practice Quiz (Quick Recall)
Q1. Prithvi par do kramik akshaanshon ke beech ki ausat bhaugolik doori kitni hoti hai?
💡 Explanation: Do kramik akshaanshon ke beech lagbhag 111 km (69 meel) ki doori hoti hai jo prithvi ki golakar aakriti par nirbhar karti hai.