टार्च और गाड़ी का हैडलाइट इतनी दूर तक रोशनी कैसे करता है? जानकर चौक जाओगे

[@Krishnayt-07g]

You are great teacher sir 3:58 ❤❤❤😊

[@p.k.953]

Aage se lagne wali kaach ya plastic ki cover bhi useful hoti hai kuch torches mein jin ke madad se roshni sidhe line mein aage jaaye isse do kaam hote hai torch se padne waali roshni ke beech mein ek bohot ujala wala kshetra banta hai wahi piche ki concave lens se aaju baju mein ek dhundla sa magar bada prakash ka kshetra banta hai

[@niteeshzn96]

Vote for khan sir 👍🙏

[@AshishKumar-dm7ek]

Chunav kab hai?

[@RohanChaudhari-qh2zc]

Beautiful explaination❤

[@mkrrupesh5087]

Khan sir best teacher hai

[@p.k.953]

Please make longer videos

[@ViralJanSuraaj]

Lantern also follow this principle ❤❤❤

[@DeepakRastogi-pb4jz]

😊😊😊😊

[@gopalray8862]

Kon kon khan sar ko padand karta hai❤

[@dikshamongre1712]

Wow 😂❤❤❤❤

[@Shubham_ku..07]

Kon kon ko pasand hai Khan sir❤❤❤

[@sushilgupta3111]

"Kisi ko koi dikkat ...."😅

[@masayaff3761]

Dhibari kya hota hai Khan sir

[@akshaypatel4599]

Sir LED system samjao. Plz

[@SanjeetKumar-ri3bl]

Avatal darpan❤

[@GuptaJi-qd5bt]

Jay hind sir

[@ks-eb5mf]

Tarch k aage uttal darpan lagaya jata h ,uska kaam light ko door tk le jana hota h

[@RRGAMING55442]

Sir short video na dala karo ..🙏

[@dileepnishad5008]

Sir aaj ki torch me age utal darpad bhi lag kar a rha taki rosni bhot door tak ja sake.

[@SanjeetKumar-ri3bl]

Yes sir

[@Akash_kushwaha01001]

Jay hind 🇮🇳🇮🇳

[@RiteshKumar-ov4wx]

Kon kon khan sir ko dil se manta h❤❤❤❤❤❤

[@akshayyadav5862]

me manta hu

[@LayakSingh-se6do]

Sir,navste

[@oNkArdEsHmUkH-ej4td]

Sir aapne aaj subh 8.15 ko Rocky Singh Sir ko call lagaya tha na ??

[@_pandey__007]

4:07 timestamp pr kisi ne kuch notice Kiya ..?

[@DSSachinrells-tc7po]

Class 12th ka Model paper BBD है

[@Abhijeetkumar-rk5nq]

Light chapter ka khali English

[@udayramsingh5164]

Sir Mai 14 year ka hu Calss 8 me ❤Sp❤ banana chahta hu

[@rajeshtiwari6856]

hmare khan sir to mote ho gaye hai 😃😃

[@Amarjeet_Kumar9341]

🎉🎉🎉🎉🎉🎉🎉

[@Amarjeet_Kumar9341]

Sar