Ray Optics 18 : Lens Maker's Formula - Derivtion and All Types of Numericals JEE/NEET

[@PhysicsWallah]

Live Classes, Video Lectures, Test Series, Lecturewise notes, topicwise DPP, dynamic Exercise and much more on Physicswallah App. Download the App from Google Playstore ( bit.ly/2SHIPW6 ) Physicswallah Instagram Handle : instagram.com/physicswallah/ Physicswallah Facebook Page: facebook.com/physicswallah Physicswallah Twitter Account : twitter.com/PhysicswallahAP?s=20 Physicswallah App on Google Play Store : bit.ly/2SHIPW6 Physicswallah Website: physicswallahalakhpandey.com/ LAKSHYA Batch(2020-21) Join the Batch on Physicswallah App bit.ly/2SHIPW6 Registration Open!!!! What will you get in the Lakshya Batch? 1) Complete Class 12th + JEE Mains/ NEET syllabus - Targeting 95% in Board Exams and Selection in JEE MAINS / NEET with a Strong Score under Direct Guidance of Alakh Pandey. 2)Live Classes and recorded Video Lectures (New, different from those on KZbin) 3)PDF Notes of each class. 4)DPP: Daily Practice Problems with each class having 10 questions based on the class of JEE Mains/NEET level. 5)Syllabus Completion by end of January, 2021 with topicwise discussion of Last 10 Years Problems in Boards, JEE Mains/NEET within Lecture. 6)The Complete Course (Video Lectures, PDF Notes, any other Study Material) will be accessible to all the students untill JEE Mains & NEET 2021 (nearly May 2021) 7)In case you missed a live class, you can see its recording. 8)You can view the videos any number of times. 9)Each chapter will be discussed in detail with all concepts and numericals 10)Chapterwise Approach towards JEE Mains/ NEET & Board Exams. ****Test Series for XI & XII**** We provide you the best test series for Class XI,XII, JEE, NEET chapterwise, which will be scheduled for whole year. The test series follows very logical sequence of Basic to Advance questions.& Evaluation of Test and Solution to all the questions at the end of the test. ========================================================= For PDF Notes and best Assignments visit @ physicswallahalakhpandey.com/ Follow us on: Instagram instagram.com/physicswallah/ Facebook: facebook.com/physicswallah =========================================================== 12th Chapter 9 : Ray Optics 01 : Introduction & Reflection in a Plane Mirror JEE /NEET kzbin.info/www/bejne/lZ-qi3qlacx7fdE Ray Optics 02 : Number of Images formeed by Two Plane Mirrors JEE/NEET kzbin.info/www/bejne/rn2wd6yOjbqZitU Ray Optics 03 : Velocity in Plane Mirror - Velocity of Object & Velocity of Image JEE/NEET kzbin.info/www/bejne/Y6vNqJ-cZtiDqrM Ray Optics 04 : Spherical Mirrors: Introduction :Focus ,Focal Length & Focal Plane - Sign Convention kzbin.info/www/bejne/hJWtdpeeaN12aLs Ray Optics 05 : Image Formation by Concave & Convex Mirror for Different Position of Object JEE/NEET kzbin.info/www/bejne/n3awgaWnmayDg7c Ray Optics 06 : Mirror's Formula -Derivation for Concave & Convex Mirror +Basic Numericals + Concept kzbin.info/www/bejne/mITbiKunm818j6c Ray Optics 07 : Magnification - Magnification & Mirror's Formula Best Numericals JEE/NEET kzbin.info/www/bejne/hmPTfXeGn5J3jc0 Ray Optics 08 : Combination Of Mirrors - Concept of Virtual Object JEE /NEET kzbin.info/www/bejne/fX2lq6SnpciFfJY Ray Optics 09 : Velocity in Spherical Mirrors - Velocity Of Object & Velocity Of Image JEE/NEET kzbin.info/www/bejne/f3mvYaWul7WKgNE Ray Optics 10 : Refraction Of Light : Snell's Law & Refractive Index JEE/NEET kzbin.info/www/bejne/jJrQipqYiNxlbsk Ray Optics 11 : Real Depth and Apparent Depth - Complete Concept with Best Numericals JEE/NEET kzbin.info/www/bejne/qIbMkJaercmSp6c Ray Optics 12 : Refraction - Shift through a Glass Slab : JEE/NEET kzbin.info/www/bejne/Z2mni6t8gtGBp6c Ray Optics 13 : Critical Angle and Total Internal Reflection - TIR - JEE/NEET kzbin.info/www/bejne/fXrZZIOEbtuWiJo Ray Optics 14 : Refraction through Prism : Concept , Numericals & Minimum Deviation Case JEE/NEET kzbin.info/www/bejne/ep-mZmCdgp1kp8U Ray Optics 15 : Refraction from Spherical Surfaces - Formula - Derivation and Numericals JEE/NEET kzbin.info/www/bejne/iYvQYX6Cqrejgas Ray Optics 16 : Lens - Introduction : It's Types , Optical Centre , Focus , Focal Length JEE/NEET kzbin.info/www/bejne/Y3ycqqibfL9opqs Ray Optics 17 :Image Formation By Convex and Concave Lens for different Positions of Object JEE/NEET kzbin.info/www/bejne/oHulZaWlmJqhaKc Ray Optics 18 : Lens Maker's Formula - Derivtion and All Types of Numericals JEE/NEET kzbin.info/www/bejne/gYqrpWh6rd-Ua7s Ray Optics 19 : Magnification - Magnification & Len's Formula with Best Numericals JEE/NEET kzbin.info/www/bejne/lXbCZ3iZdpt-qJY Ray Optics 20 : Combination of thin lenses in Contact II Cutting Of Lenses II Power - JEE/NEET kzbin.info/www/bejne/bpqUkK13aJhphsU Ray Optics 21 : Silvering Of One Surface Of Lens - Silvered Lens JEE/NEET kzbin.info/www/bejne/aZa7ZmV6Ypx6bpI Ray Optics 22 : Microscope - Simple Microscope & Compound Microscope - JEE/NEET kzbin.info/www/bejne/Y4KsqZyjrMl-j6s Ray Optics 23 : Telescope - Refracting Telescope & Reflecting Telescope JEE/NEET kzbin.info/www/bejne/pGnRdHp3nJh0q7c

[@shubhamkartik724]

Thanks sir for a great help

[@sadatpur-218shriramcolony7]

Sir jo hmne focal length find kri vo f1 h ya f2 Also kya f =R ho skta h?

[@challengex8401]

present sir

[@challengex8401]

I have completed this lecture on 1 December 2019..

[@techandtech3670]

Sir aap sign convention bhool Gaye pehle aap last me rkhne wale the phir nhi rakhe

[@KEASUR]

I am quite scared that the jee competition will become more harder and harder as many students have been attracted towards the channel

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Nobody never cleared any competition by just watching videos on YT

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smruti rekha padhi I wrote by JUST WATCHING the videos

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It's really on you to be honest. You need to study harder than others and get a good rank

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THERE IS ONLY ONE KIMG IN THE JUNGLE!

[@bhuvanyuwalia7001]

optics is a very important physics chapter for the NDA Exam and sir's lectures helped me so much to score very high in NDA GAT paper(physics section).

[@kavyanshicharan7276]

heyy bhuvanyu can u please tell me how to score good in maths NDA

[@bhuvanyuwalia7001]

@@kavyanshicharan7276 in NDA maths, UPSC checks our conceptual knowledge and time management skills, so one needs to make his/her concepts very strong and Practicing previous year questions is the most important part of the preperation. You will also come across many shortcuts and tricks which will be helpful in finding the answers. I have noticed that the most common mistake candidates do is focus on calculus. Although a good number of questions do come from there but in my opinion the priority order should be : 1. cordinate geometry and 3D geometry and vectors 2. Trigonometry, complex numbers, sets relations and functions 3. Statistics and probability 4. Matrices and determinants 5. Calculus 6. Algebra Also don't forget to learn simple chapters like binary numbers and log. And make a seperate notebook where you write all the important concepts and tricks for each chapter Rest is consistent hardwork. All the best.

[@novagaming2516]

@@bhuvanyuwalia7001 bro I've a question that gat exam is of class 12th level or questions are asked from below 10th standard syllabus

[@bhuvanyuwalia7001]

@@novagaming2516 I studied my ICSE class 9 and 10 history polity and geography books for GAT. I find NCERT a little complex.

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[@urwashithakur7052]

The main aspect where physicswalla teaching differs from others is his amazing way of solving complex numericals really sir i got full concept of lens makers formula thank you very much sir.🙏🙏👇

[@dipanshusharma7680]

Hii

[@MotivationalFire7272]

Ur number is Plse

[@officiallyocean6052]

54:02 We can slove this question in other way without using thin lens formula Here f = 10 cm Now this 10 cm is F2 now here as the medium in both the sides is same hence |F1| = |F2| Now from here we can tell that the object is placed at 2F1 now when object is placed at 2F1 image is formed at 2F2 that is real Therefore, Answer is it is formed at 20 cm, Real 👍

[@lokeswararao3531]

🤫

[@prabhat1973ful]

Bro if you noticed this was a similar question which was given in mirror's case also and there too sir solved using formula and later at the ending of the solution said it is the case of object at C , image at C . Sir is doing so to make us familiar to these new formulas . Short reply - Haan haan maloom hai apne baap ko ma sikha :)

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THERE'S A GUY LIVING INSIDE THE COUNTRY (NOT ON THE BORDER) WHO IS FIGHTING TO MAKE HIS STUDENTS ' THE BEST' AND HELPING THE COUNTRY TO DEVELOP, HE IS OUR TEACHER ALAKH PANDEY SIR SALUTE AND HATSOFF SIR!!!!! PROUD TO BE AN INDIAN AND SUBSCRIBER OF HAMARA CUTE SAA CHANNEL PHYSICSWALLAH 🇮🇳🇮🇳🇮🇳

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[@bringuser]

4:12 intro 16:15 derevation pt 1 18:59 pt 2 20:07 thin lens formula 22:41 point to remember 26:30 a1 29:49 a2 36:17 a3 39:10 IMPORTANT POINT

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Ok, so smartphone and having access to internet(KZbin) does not count as technology?

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@@ayushrai3857 chup be chutiye ....ye bol rha hai na smart board hai na live class hai na paid batch hai ..sirf eak whiteboard hai

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The math ain't mathing. 🗿💀

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The greatest teacher ever❤️❤️ love u sirr

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almost completed the chapter, cant wait for the moment to finally finish it, would be really satisfying!

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Ur number plse

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Halwa to chapter hai 😂

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THE WAY HE KNOWS WHAT A STUDENT WILL ASK.................ITS AWESOME

[@VISK12]

Vidyalankar wale

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@@VISK12 yes

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Sir Jst bcz of u... My ray optics concepts have strengthened... Tq sir for ur amazing works... May u continue to do so n cherish every student's life like me....

[@AshishGupta-wv8hu]

Numerical start 22:53

[@shaily5087]

Aajh se aap mere bhagvaan ho sir. 2 ghanto se lensmakers samajhne ki try kar rha tha, aapne 15min me samjha diya aur Monday ko mera boards ka papaer hai. Aapko jitni baar thank you bole utna kam hai. Keep up the good work😀😀 - Devansh savani

[@funwithphysics8877]

Those white board lectures were >>> ❤️

[@superconcepts8607]

Jo cheez poore saal nhi samajh aayi wo ab samajh aayi.... Guruon ke guru alakh sir 🙏

[@PhysicsWallah]

Download PDF Notes of this Lecture soon @ physicswallahalakhpandey.com/class-xii/physics-xii/09-ray-optics/

[@its_saifi_sajid5807]

hello baccho

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Sir live aye na

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SIR, NEXT VIDEO ON POWER OF LENSE

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Hii all friends

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thanks a lot sir... 😚😚😚a man showing his talent , his determination.... Only needs a appreciation...😀😀😀😀😀 #hats off to you Sir... And loved the frequency of videos👌👌👌👌

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Dosto sab last me kam kam se itna zaroor karna ki board k bad sir k channel ka 100 ka to maddad zaroor karna. Afterall he is the one on which we are depend fully before each exam. Sir You are the next ANAND KUMAR and we are your super 2M batch😘😊

[@anuraghazarika2899]

Like you make us understand the concepts and u keep trying untill we understand properly, you give us best numerical to build our confidence, and mainly you solve the problems with us. Like a teacher like u is very hard to get. You are the best sir. Respect and love to you❤️

[@aaradhyasrivastava8567]

thank you sir for all your efforts. my sincerest gratitude🥰😇🙏🙏🙏

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Happy diwali sir. You are the light of our life

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One of the best teacher in the universe 🥺🥺

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Sb smjh aa gya sir... 🌺🌺🌺🌺🌺🌺

[@shifalisaif1412]

Ph.D in lens formula n lens maker formula...and all rather questions✌❤such a blessing u r sir😎

[@ManzoorAhmad-pl2od]

Thanks sir too much , Love u sir ,is lens maker formula nai Bhoot. Parashaan kiya tha mujhe

[@anantshukla1983]

After Disha patani .... Alakh sir advertisment for Calvin Klein

[@vibrant0]

Exactly 😂

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Nice

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After alakh sir disha

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Lol good one.

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Disha is my didi

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28:52 "jb tak dhakkan na gire lecture pura nhi hota" Sir aap ye line bolna bhul gayee pr ab hame yaad ho gyi line 😊😊😊

[@AnviTiwari-jx9ce]

Outstanding explanation sir 🤩🤩🤩🤩🤩🤩🤩🤩🤩😇😇😇😇😇😇💛

[@subhramitbasu3886]

I study in one of the top batches of Allen, Kota. We have a very nice physics teacher. But I hated ray optics ever since I first came across it (both due to its seemingly feel-lacking nature and also since was taught very fast here to us in 13th). I finally learnt this chapter properly here and honestly, it's become one of my favorite topics now. I can say beyond doubt that in terms of knowledge, Alakh sir is better than most of the highly-paid faculties of Kota. Hats off to his dedication and sacrifices.

[@pankhudisingh3481]

Hey can you please help or guide me how to prepare for jee

[@subhramitbasu3886]

@@pankhudisingh3481 hey Pankhudi. Sure, how can I help you? Suggest a platform where we can talk.

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MAY GOD BLESS YOU

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Thanks atleast I found a person who doesn't write *HIT LIKE* after wishing sir. You're a pure soul. And not a photage one. 🤘

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@@vartikaindora5906 Hmm-umm, you like exploring comments.

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@@peteraiden7325 Bhai Nahi degi ...

[@teenawadhwa5439]

Thank you...god of physics🙇‍♀️

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The satisfaction you get when your answer and sir's answer matches.....is on next level!!💫🔥

[@abheysuman418]

58:17 "mujhe padhna hi nahi hai sir, mere saath dhokha hua hai bola tha science le lena zindagi banjayegi, kya ho raha hai ye" 😂😂 That line 😅😂

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Same 😔 brother

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Sahi bat ha 😀😀

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U r right

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Absolutely best video on lens makers formula💯💯

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Congratulations for 11 million ❤❤❤❤❤❤❤❤🎉🎉🎉🎉🎉🎉

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Thanks sir for your wonderful lecture.

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I knw this is just a drop in myriad of other comments.... But can't avoid to say.. U're just amazing sir🙂never letting concepts feel too tough ever

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yes worthless comment to be consider

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Bahut bahut dhanyawad sir ji🙏🙏

[@thisisthakurharsh]

Thank u 🙏🙏🙏sir

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I have no any word that how I thanks to u u are such a Grt person a Grt teacher...... your hard work makes u a superhero not only on India but also on other countries.... This is very pride for all of us... Thanku so much sir for all your contribution towards us....

[@secratic_balak_]

SHORT CUT USE MT KRYE WRNA SIR SOCHEGE INHE LIKHNA NHI AATA OR 12 ME PADH RHI H 😂

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thank You Very Much sir From Nepal kya EFFORT He Sir Aapa Ka..Sayaad Duniya ma Aap Jesa Koi Nahi He.😍😍💞

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You just changed my life, you are great sir,

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Sir is great

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You're the best teacher in my life....♥️ God bless you sir thnkyou so much ❣️💫

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Hi

[@somanathdash3153]

Thank you sir 😁

[@khushipandey7598]

2 months later I have my boards and I didn't understand anything when my school teacher taught this. But after watching this video I think I can score now. PANDEY SIR IS THE BEST!!!!!!

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He's actually great dude 👌 He needs our full support and we are not doing much for him as he is..😔

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Kitne marks aaye ?

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47 :09 what a true linning 😀😀😀😀

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Sir....Khushi ke maare aansu aa Gaye....itni Khushi kabhi kuch padhke nahi aayi thi..... #BestTeacherPhysicsWallah Thank u loads n loads sir for these amazing efforts of urs for providing us free education via YT💜😌🙏🏻

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Thnkuuu very much sir.. Aaj sare questions khud kiye ..srf aapke wjah se .. lve U vry much

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Very informative lectures 😊

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Love you sir.... For teaching in a fabulous way 😋✨..... It helps me a lot

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Thank you so much sir it's totally cleared I believe on you

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Mereko to lagta hain ki 200 dislikes galati se dabadiya hoga kisine like karte samay. Aise khoobsurat cheez ko kaise koi dislike kar diya samajh nhi aaya.

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Best lecture student from america

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Kitne log apni LIFE me ek bar SIR se jaroor milna chahte hai

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IN THE NOON OF 4:10 PM when this man uploads a new fresh lecture shows his determination

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It is May of 2024 and still this lecture is worthfull

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Thank you so much sir 😁😊😊😊😊😊😊😊😊

[@anshjain3351]

33:57 thankyou sir neend se jagane ke liye

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jaisa bhi hai jo bhi h bahut achcha chal r hai syllabus ! perfect. | perfect. |

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You are very old viewer of pw😃😃 You are in which year right now?

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Great Teaching Skills Sir Ji 🤓🤓

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Thanks a lot sir #physics wallah

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Hello IIT hua ki nhi?? Ye comment 3y pehele ka hai aab tak to JEE de di hogi.. Konsa college Mila?? 2024 mai mai JEE duga Any tips and tricks?

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You are great sir🎉🎉🎉🎉

[@Akash-mm4lp]

now also his explanation is unbeatable

[@ritikkumar-on2nw]

Amazing concept sir. Maine kal apne teacher ko bataya ki convex lens ki focal length always +ve nahi hota except air.

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Best teacher for online studying 😊😊😊

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Even for offline

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54:06 was funny 😂😂

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Guruji sbse alag ❤😘😘🤗

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thank you so much sir

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2M par live aaiye❤

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10 -15 DeC.

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Watch. My video

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Nezuko

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@@PakoY2J kawaii😍 nezuko

[@allinone3168]

21:55 Previously when we derived formula using sign then again we used sign convention in the formula and now we derived formula without sign convention Then also we are using sign convention in the formula???

[@Hello-ep2fi]

See this ur doubt will be cleared

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Watch HC Verma Sir's video on this topic on KZbin itself

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@@Hello-ep2fi yahi to problem he jis bacche ko doubt aayega wo Kahan jayega?? Unacademy plus pe padha karo

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[@patakotisrinivas1918]

Awesome explanation sir...enjoyed a lot ,besides learning..thanks a lot...

[@qwertyuiopqdi25]

54:29 we can give ans directly as if object is at 2f then image will also form at 2f behind the lens

[@haidarhussain7809]

Bhai numericals mein solve krne ke number milenge

[@deepak4787]

Pryagrajjj ke alakh pandey ko teh dil se Salam . God bless you sir.

[@akshinbarathi8914]

sir apka lecture badia hai ise me neet me acha mark pa saktha hu thankyou soo much sir

[@priyanshudixit01]

Wow , great numericals 😮

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sir u are a best teacher ever I watched video

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I like it physics wallah because it clear the concepts

[@weird_a_weird]

Heartfelt thanks to u Sir fir what ur doing for us 🙏🌹✨

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I'm of bacth 2022 but this video is still that important as it was 2 yrs back ,💯✨ U r seriously amazing PW sir♥️👍🏻

[@kinochintudurum9872]

Absolutely right 👍 we are going to give examination day after tomorrow. I made my whole notes from Sir Alakh Pandey's Video lectures.

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@@kinochintudurum9872 hnnn🥴 goodd😊👍🏻

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Sir ye important hh

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Hi

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​@@Sheetu_NEET_2024hi miss

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Sir ; clear hai sawal? Me ; Taping screen to open mic Addicted by zoom 😂

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😂😂😂

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Bad joke

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😂😂

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Luv u sir....all concepts are cleared now

[@Ashish.00001]

Love 😘😘 u sir ❤️❤️❤️

[@34jaysuva80]

Sir is official brand ambassador of Calvin Kevin🤣🤣

[@sandeepsinghshekhawat1521]

Chalo koi toh ha sath wla 😂😂

[@the_epiclore_]

Thanks a lot sir it was a great lecture 💙💜💙💜

[@IvanLucas]

This lecture is so perfect that it forced me to pause the video and praise him for the good work he has done for us.🙏

[@AshishKhetwal]

i always do that

[@shikhargupta6526]

Could you please tell me ki Hamen yah Kaise Pata chalega ki Hamen kahan per Lens Maker Formula lagana hai aur kahan par thin lens wala

[@electrohub2410]

👍👍👍👍👍👍 best ever teacher clear and cut concepts❤️❤️❤️❤️

[@jaykishan106]

Thank you sir😊😊😊....

[@ayushmishra1173]

Sir exam se ek din pahle dekh Raha hu 😁😁 and you make the concept crystal clear, thank you sir 👍👍

[@CristianoRonaldo-ij9hz]

kuch bhii

[@ayushmishra1173]

@@CristianoRonaldo-ij9hz what kuch bhi ???agar dimag hoga to smjh jaoge

[@AadilSiddiqui8989]

​@@CristianoRonaldo-ij9hzschool exams ki baat kr rha wo. Mai bhi whi kr rha

[@rakeshkumarmishra3575]

Sir please start a series of vedios that contains quality questions from important chapter. that will help us for jee2020 revision

[@Channel_]

Now i start Loving physics 😆😘

[@VishalGupta-cu3yj]

1:04:56 i. -160 ii. -32 iii virtual and erect

[@Bella_ciao117]

Aaj ka Easy lecture 😊

[@valerian2768]

Use the like button as happy teachers day wish to our beautiful teacher, physicswalla

[@grootplays4847]

After 1 week there will be my exam...and now i m here🤦‍♂️😇

[@kunaljain5638]

Ho gya exam

[@priyanjaldevda4420]

Same.... Pre boards are going to start but my syllabus......🙁🙁🤐

[@grootplays4847]

@@priyanjaldevda4420 where are u from👀

[@priyanjaldevda4420]

@@grootplays4847 from...harda mp....nd u....?

[@grootplays4847]

@@priyanjaldevda4420 nepal🤗