PhysicsBhanu · Class 4-5
Safed roshni ke andar ka rang-mela
Neeli roshni aur laal roshni, kya dono ek jaisi hain, bas rang alag?
Socho pehle… phir dekho jawab
Nahi! Har rang ki roshni ka kaam alag ho sakta hai. Scientists ne ek aisa chhota 'darwaaza' dhoondha jo sirf neeli roshni se khulta hai.
Suraj ki safed roshni asal mein kai rangon ka mel hai. Jab woh paani ki boondon ya kaanch se guzarti hai, toh rang alag ho jaate hain aur indradhanush banta hai: VIBGYOR. Yaani baingani, jaamuni, neela, hara, peela, naarangi aur laal.
Cause-effect: har rang thoda alag mudta hai, isliye rang ek-doosre se door ho jaate hain. Isi wajah se safed roshni rangon ki patti mein khul jaati hai.
Ek chhote paani ke jeev (alga) mein ek protein milta hai jo neeli roshni padte hi turant khul jaata hai, jaise ek darwaaza. Isse scientists ab neeli roshni se chuni hui nerve cells ko 'on' kar sakte hain. Is khoj ko 2026 ka Medicine Nobel mila. Socho, ek chhote se jeev ke sawaal se itni badi khoj!
Ghar pe try karo
Bade ke saath dhoop mein ek purani CD ya paani bhara gilaas rakho aur deewar ya safed kaagaz par rang dhoondo. Kitne rang gine? Kaunsa rang sabse upar, kaunsa neeche?
Wow!
Ek chhoti pond wali alga ke sawaal se dimaag samajhne ka naya tareeka nikal aaya!
Mummy-Papa ke liye
Aaj dhoop mein CD ya paani ke gilaas se bachche ke saath rang dhoondhiye aur unke naam VIBGYOR ke kram mein bulwaiye.
3 sawaal
- Safed roshni asal mein kya hai?
Jawab dekho
Kai rangon ka mel. Safed roshni kai rangon ka mel hai.
- Rang alag kyun ho jaate hain?
Jawab dekho
Har rang thoda alag mudta hai. Har rang alag mudta hai, isliye rang door ho jaate hain.
- Alga ka protein darwaaza kis roshni se khulta hai?
Jawab dekho
Neeli. Woh darwaaza neeli roshni se khulta hai.
NCERT se jodo: NCERT Class 5 EVS — roshni aur rang; aas-paas ka vigyan