Video narration
Jab aapke mobile ka camera tasveer banata hai, to asli kaam lens karta hai, sensor karta hai, ya phone ka processor? Aankh bhi isi tarah kaam karti hai, lekin iska camera jeevit hai. Baahar ki roshni pehle aankh ki saamne ki paaradarshi parat se guzarkar putli se andar aati hai. Iris putli ka aakaar badalti hai, taaki roshni niyantrit rahe. Phir lens, camera ke lens ki tarah, prakaash ko retina par saaf kendrit karta hai. Lekin yahin zaroori mod hai: aankh tasveer nahi banati. Retina prakaash ko tantrika sanketon mein badalti hai. Optic nerve inhen dimaag tak pahunchaati hai. Dimaag in sanketon ka arth nikaalkar drishya banata hai, aakaar, doori aur saamne ki cheez pehchaanta hai. Isliye mobile camera mein processor tasveer banata hai, jabki aankh mein yeh bhoomika dimaag nibhaata hai. To camera jaisa prakaash pakadne ke baad bhi, humein dikhta tab hai jab dimaag un sanketon ko arth deta hai.