১। বিজ্ঞানে হাতে খড়ি: পূর্ণ অভ্যন্তরীণ প্রতিফলন (Total Internal Reflection)

[@fahim3082]

অনেক ধন্যবাদ, এভাবে প্রাক্টিকালি দেখানর জন্যে।

[@rasel.003]

I knew this....... never saw a practical example......and didn't know that it is used in optical fiber...... Excellent...

[@ayshasiddikaauntara7142]

wow! first time saw it practically!

[@faridayasminlucky8197]

Wow...I have seen it practically for the first time :-)

[@reazuddinshohan6322]

অনেক দারুণ I Loved it

[@ayonpersonal]

thank you via. .ekhon jodi.. SONKOT KON ar CAMERA er KAJ. ta nia akta video korten tahole shuida hoto ..

[@manirulzaman7346]

Thanks a million for making the lesson too much easy

[@newsoul9155]

অসাধারণ....👌👌👌

[@minhazsammy351]

josss

[@Tahmid_Shahriar]

ratul vai👌👌👌

[@lm10-theboss8]

Thank you,10 minute school

[@Deshimcsmcm]

gd

[@golamfaruk7039]

Nice🎉😮

[@10msmain]

Thanks!

[@istiakahmmed8736]

Thanks 10minute school

[@mamduhmd.mamduh4259]

Very interesting experiment

[@shafin123]

Nice

[@farhanshaikh174]

jossss

[@tarekulislam9928]

অনেক ধন্যবাদ

[@abuhamza9484]

Excellent

[@MasumBillah-sq2tm]

wow

[@cuber2some]

Such a great explaination

[@hanifkhondokar2122]

Thanks a million.

[@rayyanqazi5001]

fantastic job. it would be superb if you would use geometric and mathematical animations with the video.thank you.thank you so much

[@saifmolla9317]

Thnx you so much 🙂 sir

[@mahfujurrahman7582]

ধন্যবাদ

[@apexsearcher4393]

wow!!!

[@almehedihasanalif]

Thanks

[@tasdidjayesiuzan8320]

thanks vaia

[@nayeemmondal1462]

Nice 🥰

[@nilaymahmud7615]

দারুণ।

[@md.nournoby4523]

ki r komu nice

[@hafsamahjabin]

Thank you sir

[@nusratdola2591]

Thanks a lot bhaiya

[@ahsanhabib5413]

Crash Course Bangla :)

[@MdAbdurrob-er2ie]

thanks

[@mynulrafi7979]

সাইন্স বক্স কি কেনা পাওয়া যাবে?

[@tanvirkhan7732]

wonderful

[@mypigeonstories]

greattttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt😁😁

[@mehedihasan-fk3uv]

Nice Background

[@alaminmahmudul2166]

vaia, why did you add detergent in water...??

[@fardinshahriwar2623]

Alamin Mahmudul পানিটা ঘন করতে।

[@alaminmahmudul2166]

Shàdów Léss tnk you.... :)

[@MdTanvir-co7bs]

vaiya aro experiment chai

[@sabrinatabassum3335]

1tta question chilo. ekhane j panita use kora hoise oita detergent pani e kno??? normal pani nei ni kno??

[@newsoul9155]

পানির ঘনত্ব বাড়ানোর জন্যে।

[@Ovi-cs3kk]

Vai ekhane light pani ved korte pare ni kintu glass ved kore hate lagse kivabe?

[@mojammelhoque7158]

বুঝলাম না

[@itrasel]

🖒🖒

[@game2.092]

AJ BLUE HA PANI PANI... 😂😂

[@safinnoob4246]

Excellent

[@kalyanmondal6855]

Nice