Video narration
Agar solar calculator roshni ko urja mein badalta hai, to paudha suraj ki roshni se bhojan kaise banata hai? Iska jawab paudhe ki hari koshikaon ke bheetar hai. Wahan ek chhota bhaag hota hai, chloroplast, jahan yah kaam hota hai. Yahin prakash-sanshleshan, yani prakash se sharkara banane ki prakriya, shuru hoti hai. Iske baahar ek seema, andar taral bhara stroma, aur usmein thylakoid ke sikkon jaise dher hote hain. Thylakoid ki jhilliyaan chlorophyll ki madad se prakash pakadti hain. Wahin paani tootta hai aur oxygen baahar nikalti hai. Lekin suraj ki roshni khud bhojan nahin hai. Vah urja hai. Yah urja stroma mein pahunchkar carbon dioxide aur paani se sharkara banane ka kaam chalaati hai. Yani paani aur carbon dioxide kacche padaarth hain; sharkara banti hai aur oxygen chhodi jaati hai. To paudha suraj ko khaata nahin, chloroplast uski roshni ki urja lagaakar sharkara banata hai.