Woh i + e = A + δ hai, deviation angle. Graph banana hai toh pehle minimum deviation dhundho, uske aas-paas curve U jaise banega. Par didi, raat ke do baje ye graph yaad nahi aa raha, bas woh chai waale Bhaiya ki baat yaad aa rahi hai ki "Zindagi bhi toh ek graph hai, aur hum sab usi minimum point ki talaash mein rehte hain." Mera phone charger karne ke liye main bhi usi dukaan ke minimum deviation pe pahunch jaata hoon.
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