Duniya ka sabse kamaal ka camera aapke chehre par laga hai. Aur wahi aankh aasman ko neela, sooraj ko laal aur baarish ke baad aasman ko saat rangon wala dikhati hai.
6 detailed lessons, ek chalta-phirta 3D Living Eye lab, Prism explorer, Spectacle power trainer aur Sky colour explorer — sab easy Roman Hindi mein.
Cornea, iris, pupil, lens, retina — har hisse ka kaam, aur aankh kaise ek camera jaisi hai.
Ek hi lens paas aur door dono par focus kaise karta hai. Near point, far point aur power of accommodation.
Apne aap chalta hai — light aankh mein andar jaati dikhti hai, object paas-door hone par lens mota-patla hota hai, aur defect chunne par image retina se aage ya peeche gir jaata hai. Phir chashma lagao aur use theek hote dekho!
Myopia, hypermetropia, presbyopia aur cataract — wajah, asar aur sahi lens (power numericals ke saath).
Kisi ka far point ya near point do — aur sahi chashme ka power khud nikaalo. Har step par jaanch aur galti par poora hal.
Safed light saat rangon mein kaise bat'ti hai, aur rainbow kaise banta hai.
White light ko prism mein bhejo aur saat rang nikalte dekho. Doosra prism lagakar unhe wapas safed banao — aur rainbow banta hua dekho.
Taare kyun timtimate hain, sooraj jaldi kyun dikh jaata hai, aur sunrise-sunset par wo bada kyun lagta hai.
Tyndall effect, aasman ka neela rang, sunset ka laal rang, aur khatre ka signal laal kyun hota hai.
Sooraj ko aasman mein ghumao aur dekho ki din mein aasman neela aur shaam ko laal kyun ho jaata hai — light ka safar dikhta hua.