FOCAL LENGTH OF CONCAVE LENS USING CONVEX LENS:PRAKASH & MINI

To determine the focal length of concave lens using convex lens.

[@Steve-wo5ry]

I have my board practical exam tomorrow...and I dont know this practical...thank you so much sir for helping me. God bless you!

[@bhavlabhyasharma581]

Same bro XD

[@divyansh2834]

Same ......

[@chehakmalhotra860]

Sameeeeeeeeeeee

[@gracearnal6203]

MERA KAL H

[@magicalvoice6255]

Are you from CBSE board?

[@ritikarajan1923]

In this time of covid you are no less then a hero for us sir. Thank you so much ❤️❤️

[@SAHILHSOfficial]

Yup 💯

[@rajivtanwar1591]

Hi Ritika You are absolutely right

[@harshalbalpande7136]

Thanks for reply 🙂

[@indrawatidevi1746]

@Ritika Rajan Heyy

[@ujjwalpandey4219]

Hii

[@nadiaozair604]

Really appreciate all the efforts you put in making this experiment thoroughly clear.Thanks a lot.

[@adityaupadhyay2964]

the best explanation presented on youtube .....hats off to you sir thankyou so much for your efforts

[@nikitapanwar14]

Thank you so much sir ☺️💗.You really help me.This video is very good. You explain better than my teacher. Tomorrow is my Physics Practical and this video's really help me lot.💓❤️

[@vershitayadav7753]

amazing video sir great efforts are put forward by you for us

[@MrSushant220]

Marvellous sir, hats of to your explanation and hard wrok

[@princeprajapati9437]

Great job sir thank you very much... very helpful

[@bhargavdhirhe1045]

Kal kiska kiska Physics Practical hai ?😂

[@krishbhatia1001]

Aaj hai bhai😢

[@monikaarya6431]

🙋

[@fanofkarnataka489]

Mera

[@Subhajit1290]

3ghanta ka bad he hai

[@Subhajit1290]

@@monikaarya6431 where ru from?

[@Princeraj-wt3el]

Love you sir... Made me confident for my practicals

[@simranturan9377]

Sir thanku so much for performing this experiment ✨👍it helped alot...

[@jaanviprashar7486]

i have my exam tomorrow sir and u really saved me thank u so much

[@anonymously25]

Sir tommarow is my practical exam!!! Need elders blessings 🙏

[@SomethinFishy-s8s]

mine is today

[@obitouchiha2545]

My name is vivek . You are amazing sir. You are lejhend

[@Ajsihsiugwuhs]

Thank you soo much sir this is very helpfull for my Tommorow's practical

[@Nandini-fm9hd]

Didi can you plz tell me ki y jo isska procedure hota h y hme yd krk jana hota h ?? Yni we have to mug up the practicals written in our practical file or just simply krna ana chaiye can you guide me regarding practicals bcz being non attending I don't know anything abt them ....didi we have to write the procedure results of practicals on answer sheet there ?? So we need to learn all the things or just we should only have to understand and no need of mugging up whatever written in file ??

[@Ajsihsiugwuhs]

@@Nandini-fm9hd bro tell this thing first, that have ever done any practical? Like have performed them live? I think no na? So ehy u are worrying soo much..take it litee don't worry your teachere will help u a lot and no need to mug up the procedures. Only u should be aware of what is happening..as no one will read your physics procedure . they we only see your observatioonn table and result calculations. As they need correct reading..if u want to mug up then just mug up the readings and headinngs in thee observation tables...they are most imp. Else make some chits...havinng those reading tables....i have done that. And cool done . Only be prepared of your viva and learnn those question based on the topic of project file. Okay? All the best 👍💯

[@Nandini-fm9hd]

@@Ajsihsiugwuhs tnkyu so much dii 🙏🏻❤️😊 Nandini here Thanks for guiding me may u achieve all whatever u want in ur life 😁🙏🏻

[@hungrysheaven1297]

sir is there any calculation for where we have to set the concave lens from the convex lens

[@subhaschavan7094]

Sir why u r placing concave lens at 42.7 ???

[@aki._.1242]

@AKSHAT GOKHALE he already prepared a slide or ppt with that value. so he had to put it in the exact place to get same value

[@chinmaybhalerao]

@@aki._.1242 so we can put it on any value between convex lens and image needle ???

[@aki._.1242]

@@chinmaybhalerao yes but not too far. Make sure you do not move the image needle of convex lens while placing the concave in between. Change only when ur adjusting

[@amarnathbhar9529]

Sir,why you placed concave lens at that particular position ,say,at42.7 cm?

[@visualphysicstutor5945]

You can place at any arbitrary point of your choice

[@AaronChristopher869]

@@visualphysicstutor5945 but why 42.7cm?

[@akaashgoklani5425]

@@AaronChristopher869 lol

[@ajitsaharan3843]

Same Q. Sir

[@aki._.1242]

@@ajitsaharan3843 he put the lens at 42.7 since he had a slide prepared with that value

[@waltterhomes4200]

2 hours before practicals💀

[@vishalparida264]

Why was the lens placed at a distance of 42.7cm only

[@NovaOsmos]

Sir how do you decide the position of concave lens Like 42.7 for 1st Then 45.2 Rhen 48 ...????

[@JATINBOHRA767]

same question have you got an answer well i think sir just took an example by himself

[@vedant.s.joshi10thable45]

Sir is really missing something 😮

[@sarvatraphysics]

Very Helpful... Great..👌 Thanks a lot sir...

[@animeislife8785]

Term 2 anyone^.^

[@preetikumari1913]

✌✋

[@shrutikapila3388]

@@preetikumari1913 ✌️🙌

[@mahwishrizvi7073]

Very nice explanation but sir i have a doubt. Why did you putted the concave lens at 42.7cm distance

[@soniyakatariya2506]

Beautiful explanation sir 💕

[@navyatiwari276]

Why did you place the concave lens at 42.7 cm only?

[@olivesandjune.8018]

Quite helpful 🙌💯

[@rajeshsinghsisodiya1468]

🔥🔥🔥🔥

[@walkersrish1179]

It was really helpful 💐

[@unique5799]

O really thanks sir It much help me for today 🤘👍

[@nitinasterix1]

sir, why u and v were taken positive while solving for f, although for concave lens there values must be negative according to sign convention??

[@sarveshpareek5687]

Although that should be the case but according to me it wasn't done so that the f calculated doesn't come out to be negative... I hopt its correct if not kindly correct me...😊

[@ritikranjand1827]

That's why study the concepts with detail...just mugging sign conventions is not suggested. The direction of the rays and the direction of measuring distance(from the optical centre) both are in same direction in both the cases( image and object distance). That's the reason but explaining things just by text becomes difficult. So hope you got It :)

[@tarun2298]

@@ritikranjand1827 thats wrong explanation its simply because we are only considering magnitude and not including sign conventions bcos we already know tht convex lens has +ve focus

[@Priynshu9]

@@tarun2298 are you mad

[@rctutorials6025]

@@tarun2298 kuch bhi

[@sonyyathulasiraman9604]

Y u do place concave lens at 42.7......

[@anantrajsharma2773]

yes i also want the sama ans

[@SAHILHSOfficial]

Yeah That's the only problem I am facing

[@bhupinderkumar5653]

You can keep it anywhere between the lens and image needle. 42.7cm maybe for calculations sake

[@anantrajsharma2773]

@@bhupinderkumar5653 okay sir thank you so much

[@priyadarsinikar5607]

Kal practical heiಥ_ಥ wo bhi ek hi din me both physics or chemistry

[@physicsissimple1118]

Thank you so much sir 🙏🙏🥰🥰

[@preetisharma4270]

Very much helpful sir

[@supercricket9184]

Sir apne L2 42.7cm kyu liya

[@omkumarpatel3622]

Sir uh r just amazing ❤️🥰💫

[@nikhillyadavvv]

Legend watch after 2 yr of upload

[@RanjeetSingh-cd6bl]

Thanks

[@vaishnavipandey5180]

Thankyou sir

[@Techymaestro]

Why is the concave lens kept at 42.7 cm?

[@jatin3106]

Its just an example I think 😊

[@Mahashiii]

just random position since you have to keep it between convex lens and image needle. btw, you have exam tomr too ? 😂

[@mashrafkhan1638]

Thank sir

[@shrutijain249]

Sir how to find that where we have to keep the concave lens?u kept it 48,42.5..???

[@Irina-bn4my]

Thank you! Helped a lot.

[@vershitayadav7753]

sir do we have to keep in mind the sign convention during the focal length calculation?

[@visualphysicstutor5945]

yes

[@kumarabhishek1196]

Sir in which school do you teach?

[@d.r.bhowmik1208]

Amazing video

[@hurshwardhan]

Sir ji apki personality ek number hai

[@pvartvalley7241]

Sir why we placed cocave lens at 42cm

[@sarthaktyagi7337]

thnx sir

[@RNSahu-vz2ud]

Ya thanx. Sir

[@mukesh3238]

Danks..

[@AbhishekRaj-sj3pm]

Great

[@bhaskarpandey3377]

thnk u sir.

[@urvashigupta8981]

Thank you sir

[@iasandgk1332]

Thanks a lot sir 🙏

[@myvizhim1587]

Sir i also need a short procedure sir

[@finiteentertainment]

How 45.2 come in 2 record

[@stutigovil4548]

Thnxx a lot sir

[@gargijadhav8018]

Dhanyawaad 😭

[@erumehsan1033]

Maine aapko sir ke almost saare physics ke board experiment mein dekha. All the best.

[@gargijadhav8018]

@@erumehsan1033 and I'm done with the final board prac now!!!

[@alpeshalpesh4286]

hi sir lens kahase kharede

[@ayushjha5911]

why on 42.7 ?????

[@rehnumashaikh1112]

Sir can u plzz upload experiment of half defelction in galvanometer ...and galvanometer conversion to voltmeter as well as voltmeter... Sir its urgent plzz

[@rehnumashaikh1112]

Also ammeter**

[@visualphysicstutor5945]

Rehnuma Shaikh it is uploaded

[@himanshupal6492]

Why concave lens at 42.7 cm can't we keep it at any other position

[@checkthelastmonday61]

U can

[@pranavsingh7404]

kal subha paper hai dekho kitne ate hai jai mata di

[@d.r.bhowmik1208]

Sir what about any index correction please answer my doubt I have exam in 24th

[@stutigovil4548]

u dont have to use index correction. just omit that column when u write observations

[@news_hunt_hindi]

🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼

[@nandinidevatwal8011]

thank youuuuuuu

[@ritikranjand1827]

OP

[@KUSHALGOKHALE]

what is so special about 42.7 cm? or is it just a lucky number for the man?

[@kumikexx7994]

Omg

[@AyushSingh-ek3bc]

Graph please 🙏

[@kanakchoudhary4065]

Sir I have a doubt... Why is the concave lens placed at the distance of 42.7 cm and 45.2 cm only? I mean on which basis??

[@itsokash]

I HAVE THE SAME DOUBT

[@SomethinFishy-s8s]

there is no such logic there sir might already had the readings and so as to keep the calculations smooth ..he took these readings

[@Manojkumar-cb8zw]

Same doubt plz reply sir

[@prabakaran-tf1nk]

I also same doubt

[@prabakaran-tf1nk]

I think that's focal length of concave lens 12.7 cm

[@AttitudeBoy-yy9du]

Aaj mera board ka practical hai😂😂😂😂😂

[@gracearnal6203]

MERA KAL H BIRO

[@rajashekharn2510]

how L2=42.7,42.2,48

[@visualphysicstutor5945]

Rajashekhar N you can choose any distance in between

[@kaushikitiwari1885]

I have the same question Thanku

[@adityachaudhary475]

Gfps se Koon Koon ha 😂

[@goswamichennal3719]

Sir Hindi midium me upload

[@anikethkm]

learn english dumbo

[@albinperera3434]

@@anikethkm shit head dickhead

[@bionicpenguin5471]

@@albinperera3434 Wow... What a great English writing skills you have got Mr. Albin Perera !!!.........

[@albinperera3434]

@@bionicpenguin5471 hello you too dickhead

[@as4533]

@@albinperera3434 every guy has a dickhead. You're probably a pussy

[@mehakpreet5189]

Thank u sir

[@aanjneyvishwakiran7097]

Thank you sir