Apart from this you can find Physics Topic wise complete solution of Questions from JEE Main 2021 Feb attempt and also JEE Main 2020 in channel's playlist. Do see them to do best in your upcoming exams !
My Mistakes and Learnings- 12:02 - sin θc = 1/μ =) (sin θ)^2 = (1/μ)^2 now put sin^2 θ = 1 - cos^2 θ ; and you will get the value of cosθ, put it in Pesc formula and you are good to go. 22:04 -> it is not nesessary that the radius of both Plano Convex lens and Equconvex lens are same, we take them as R and R* Q9- The Cartesian sign convention for distances relative to the lens depends on the location of the object or image: Left side (opposite to light direction): Negative Right side (along the light direction): Positive The left side of the lens (the side from which light enters the lens) is taken as negative for object distance. Since the object (virtual image formed by the plane mirror) is on the left side of the lens, its distance 𝑢 u is negative. Thus: u=−3m.
31:40 How to decide which formula to use when nothing is mentioned in the question? Two formula for magnification - Image at LLDV and one for image at infinity, among these two. Thank you sir.
Physics revision checklist 11:23 best question on refraction 26:39 silly error while solving due to double reflection by plane mirror 36:34 good question solve once more
5:45 good question try again 16:00 do again 24:00 problem in understanding the graph 28:00 couldnt predict last refraction 35 :00 really good question must try again 38:30 revise velocity of images part
q.3 7:30 (GOOD QUESTION) Q.7 22:06 ( ALWAYS DO THESE QUESTION BY TAKING RATIOS AND R DUSRA HOGA) Q8 25:00 (NICE QUES) Q9 27:40( I2 KA BHI IMAGE LENA THA) Q14 39:20 (NICE FOR REVISION) Q18 46:30 (REVISE SCOPES )
Completed! Sir it would be really helpful if you please bring a detailed concept video on displacement method of convex lens! 5:50 (approach) 20:35 23:42 (graphical analysis)
0:49 q1 revise. Good question on relative permiability 27:15 q9 always consider final image after reflection by lens. Since the object se nikle hue rays are from left to right and the rays from virtual objegt is right to left hence in third reflection it's taken negative Left question 10 11 18 34:00 q12 good question. Make diagram and solve
@@KeeratrajSingh You mean that since rays of initial object is moving from left to right and the rays from the virtual object by mirror are moving right to left. Hence its taken as negative
Q3. repeat (liked the question) remember all the cases of concave mirror Q8. revise Q9. revise D is 25 mm in compound microscope Q12. repeat Q14. repeat Q18. revise
Saw this 40 min lec for 1hr 15 min... 22:19 graphical q 30:00 optical instruments 34:33 for this question I didn't trust myself..so kept on trying for extra 15min..so that I can get some simple answer with integers..i.e convertible into denominator 100...but actually my is root(2/5).. which is correct.... Same happened with this q 43:24 ..when I solved before 😢 Finnally completed 2020 ray optics pyq.... thankyou sir 🙏
doubt sir 28:14 1. sir isme agr v -ve ata to kya hm image ko lens ka age mante??2. 2.aur isme virtual/ real kaise mante h ?? real mirror ke respect me h kya sir mirror ke age bnni 3. u ka sign covention kaise liya?
6:33 spherical cap question ( visualisation) 22:44 graph 27:29 image 3 banegi or tisri ka distance batana hai 38:20 direct formula ✅ 40:26 refraction and reflection at farther surface 😶 42:45 good que Microscope based que ( baad me karunga )
38:06 dear sir I have doubt in this question. How do we know that the speed given is speed || to PA or perpendicular to PA. If we consider || to PA then we just dont sqare (v/u) and we get answer as 3 cm/s. If we consider speed perpendicular to PA then we square (v/u) and get 1 cm/s. Do we need to consider speed perpendicular to PA by default of not mentioned ? Please Help
34:52 angle angle side congruence Hence sides equal 44:59 thin prism and no formula for min deviation ( formula only for large prism) ie normal deviation puch rha bss Last ques learn
@@niharikakhanna3585 30:20 sir Qno 10 me pta kaise pda ki ye object infinity pe rkha hua h or hme usi ka formula lgana hai....?????? If u know please ans me
27:21 sir aapne u negative kyu lia wo to ab lens ke right side m h na so postive u hoga na Aur sir kaise pta chalta h ki relection kitne round karana hota h ?
28:39 sir in question 9, how do we know kitne reflections/refractions karwaane hai, and in question it is also not specified ki image distance lens se ya mirror se leni hai?
11:26 sir my coaching teacher explained it very pathetically, he didn’t use the fact of 2pi*r*h , I’m happy to know that this is simple logic. All thanks to you.
28:07 dear sir,how would i know that how many reflections i have to consider in multi lens/multi mirror problems.....like here u consider 3 reflection....but after the formation of I[3] image why we won't consider the 4th reflection in the lens..........plzzz help me sir
22:23 Thanks sir 🙏 was looking for a solution for this question ... Everybody else either made it too complex or solved it wrongly but i knew that Mohit sir might have solved it in one of his session and as expected your solution was simple and clear ....thank you again ❤
I don’t comment anything usually but it’s heartwarming to see Sir just commenting on almost all of my comments from the past few days , thank you sir✨💗
Sir currently I'm studying ray optics. I already have basic ncert knowledge of the complete chapter. At this time round should I solve my coaching sheets or last 20 years PYQs..
sir in question no. 11 you have used formula for image at D but it is not mentioned in the question But sir if nothing is mentioned in question we generally take formula for image at infinity?🤔
3 thoda tricky 5 new concept 8 bn to gya par repeat krna hai 9 mirror k image ko hi final man liye the 12 13 straight formula 14 good question 16 new concept
✅All PYQs LINK (Save Time) - th-cam.com/video/UZYfrQbVw_0/w-d-xo.html
Join us on 🚀 Telegram Channel - telegram.me/edunitimg
Apart from this you can find Physics Topic wise complete solution of Questions from JEE Main 2021 Feb attempt and also JEE Main 2020 in channel's playlist. Do see them to do best in your upcoming exams !
sir i did not understand Q-8 solution. please help if possible.
in ques 4 answer will be b as image size is less than object size
BHaiya ap kis college me h😊@@captainamerica7543
My Mistakes and Learnings-
12:02 - sin θc = 1/μ =) (sin θ)^2 = (1/μ)^2 now put sin^2 θ = 1 - cos^2 θ ; and you will get the value of cosθ, put it in Pesc formula and you are good to go.
22:04 -> it is not nesessary that the radius of both Plano Convex lens and Equconvex lens are same, we take them as R and R*
Q9- The Cartesian sign convention for distances relative to the lens depends on the location of the object or image:
Left side (opposite to light direction): Negative
Right side (along the light direction): Positive
The left side of the lens (the side from which light enters the lens) is taken as negative for object distance.
Since the object (virtual image formed by the plane mirror) is on the left side of the lens, its distance 𝑢
u is negative.
Thus: u=−3m.
well done on completing it
keep learning and solving
@@mohitgoenka99 Sir, I totally did not expect you to reply. It really made my day, thank you so much sir, It means a lot
RAY OPTICS-REVISE💥
5:45[Good Question]
22:21[Graph Based]
26:11[Good Question]
33:43[Good Question]
39:00[Do it Once Again]
33:40[Do it Once Again]
well done dear
RAY OPTICS REVISE ❤
DOUBT QN: 5:45 NEXT LEVEL
25:00 Graph
26:11 Final img problem
33:23 Once again.
43:11 New formula 😮
well done dear
#learnlikeneverbefore
31:40 How to decide which formula to use when nothing is mentioned in the question? Two formula for magnification - Image at LLDV and one for image at infinity, among these two.
Thank you sir.
SELF REVISION :
1. 0:49 revise
2. 3:12 formula based(easy)
3. 5:22 revise
4. 12:45 formula based (easy)
5. 14:32 graph based revise
6. 16:51 easy
7. 19:08 formula based
8. 22:20 graph based easy
9. 25:27 revise
10. 29:50 easy
11. 30:34 easy(revise compound microscope)
12. 31:04 formula based
13. 33:22 revise
14. 37:50 formula based
15. 38:43 easy
16. 41:00 formula based
17. 41:54 revise concept
18. 44:24 easy
19. 46:02 revise
very good dear
keep learning and solving
Physics revision checklist
11:23 best question on refraction
26:39 silly error while solving due to double reflection by plane mirror
36:34 good question solve once more
well done dear
keep learning and solving
#learnlikeneverbefore
5:45 good question try again
16:00 do again
24:00 problem in understanding the graph
28:00 couldnt predict last refraction
35 :00 really good question must try again
38:30 revise velocity of images part
well done on completing it
keep learning and solving
SELF REVISION :
0:49 revise
3:12 formula based(easy)
5:22 revise
12:45 formula based (easy)
14:32 graph based revise
16:51 easy
19:08 formula based
22:20 graph based easy
25:27 revise
29:50 easy
30:34 easy(revise compound microscope)
31:04 formula based
33:22 revise
37:50 formula based
38:43 easy
41:00 formula based
41:54 revise concept
44:24 easy
46:02 revise
very good dear
keep learning and solving
Revise Microscope questions
29:54
30:45
45:13
well done on completing it
keep learning and solving
35:59 5:15 6:56💥💥 16:36 25:15
27:36 virtual means behind the 38:20 mirror 44:14
q.3 7:30 (GOOD QUESTION)
Q.7 22:06 ( ALWAYS DO THESE QUESTION BY TAKING RATIOS AND R DUSRA HOGA)
Q8 25:00 (NICE QUES)
Q9 27:40( I2 KA BHI IMAGE LENA THA)
Q14 39:20 (NICE FOR REVISION)
Q18 46:30 (REVISE SCOPES )
well done dear
keep solving & learning
#learnlikeneverbefore
4:20 formula
6:04 hard :(
16:33 25:15 graph
21:15 35:13
Q10 11 16 18 instruments
well done on completing it
keep learning and solving
Completed! Sir it would be really helpful if you please bring a detailed concept video on displacement method of convex lens!
5:50 (approach)
20:35
23:42 (graphical analysis)
Hes
Respected Sir - Q9...... 25:21
What if I stopped at i2 and give the answere as A)
Why you went to i3 ? What is the logic.
unless asked any thing specific, we go for final image
0:49 q1 revise. Good question on relative permiability
27:15 q9 always consider final image after reflection by lens.
Since the object se nikle hue rays are from left to right and the rays from virtual objegt is right to left hence in third reflection it's taken negative
Left question 10 11 18
34:00 q12 good question. Make diagram and solve
very good dear
keep learning and solving
1:37 6:06 14:35 17:18 21:29 22:38 26:35
well done on completing it
keep learning and solving
in question 9 why - sign was taken for u as it is the right side of lens?
Beacuse light rays from the object aretravelling from right to left in final object
Bhai abhi tak toh uska jee clear bhi hogya hoga😂😂
@@manikjain4113😂
@@KeeratrajSingh You mean that since rays of initial object is moving from left to right and the rays from the virtual object by mirror are moving right to left. Hence its taken as negative
@@gulammustafakhan9835Yes you are right
Q3. repeat (liked the question)
remember all the cases of concave mirror
Q8. revise
Q9. revise
D is 25 mm in compound microscope
Q12. repeat
Q14. repeat
Q18. revise
4:00 , 7:00 ,22:00 ,27:00 , 33:00 , 40:00 ,42:00 ,46:00
well done on completing it
keep learning and solving
Saw this 40 min lec for 1hr 15 min...
22:19 graphical q
30:00 optical instruments
34:33 for this question I didn't trust myself..so kept on trying for extra 15min..so that I can get some simple answer with integers..i.e convertible into denominator 100...but actually my is root(2/5).. which is correct....
Same happened with this q 43:24 ..when I solved before 😢
Finnally completed 2020 ray optics pyq.... thankyou sir 🙏
well done on completing it
keep learning and solving
doubt sir
28:14 1. sir isme agr v -ve ata to kya hm image ko lens ka age mante??2.
2.aur isme virtual/ real kaise mante h ?? real mirror ke respect me h kya sir mirror ke age bnni
3. u ka sign covention kaise liya?
2nd formula revise
3rd-concept
12th- redo
14th- CONCEPT imp
very good dear
keep learning and solving
7:15 ,😮 thank-you sir
35:36 hvy. 45:45 cnpt. Done ✅
12:14 redo
25:02 redo
28:29 redo
37:36 redo
43:17 note
very good dear
keep learning and solving
Its really an amzing session.. I have gained lot of confidence after watching this.. Thnx so much sir
All the best
Bhai Apke pass physical chemistry ka 19 20 21 ka previous year solution hai kya chapter wise...?????
Bhaiya , your content is too good for us than you will ever know. Great job + Great Visualization for the light source in water. 👍
Thanks a ton
Bhai Apke pass physical chemistry ka 19 20 21 ka previous year solution hai kya chapter wise...?????
Bhai Apke pass physical chemistry ka 19 20 21 ka previous year solution hai kya chapter wise...?????
6:33 spherical cap question ( visualisation)
22:44 graph
27:29 image 3 banegi or tisri ka distance batana hai
38:20 direct formula ✅
40:26 refraction and reflection at farther surface 😶
42:45 good que
Microscope based que ( baad me karunga )
30:21 we have another formula for telescope when image is at D why we not used that as nothing is mentioned in question
5:17 Remember What is H
14:10
16:45
For graph check various values of X and Y to get desired graph
25:18 Ray diagram
33:05
38:40
45:10
well done on completing it
keep learning and solving
28:40 (GG SAWAL)
40:19 (GG SAWAL)
42:20 (GG Q )
38:06 dear sir I have doubt in this question. How do we know that the speed given is speed || to PA or perpendicular to PA. If we consider || to PA then we just dont sqare (v/u) and we get answer as 3 cm/s. If we consider speed perpendicular to PA then we square (v/u) and get 1 cm/s. Do we need to consider speed perpendicular to PA by default of not mentioned ? Please Help
God of physics our og legend Mohit Sir,due to him no one can beat me in physics in my class thank u so much sir...
12:36 diagram (visualise) (large surface area ques)
sir at 30:40 why have u used magnification formula of strained eye only and why not relaxed eye
30:20 sir Qno 10 me pta kaise pda ki ye object infinity pe rkha hua h or hme usi ka formula lgana hai....??????
7:07 sir superb sir apki hi videos se revision Kar haha hu phy me
excellent dear
Sir in question9
Why did you take u = -3m? (distance of 2nd image from lens)
yes same doubt
34:52 angle angle
side congruence
Hence sides equal
44:59 thin prism and no formula for min deviation ( formula only for large prism)
ie normal deviation puch rha bss
Last ques learn
28:05 Question 9, Sir why did we make image 3 using image 2, and not stop and report the answer at image 2? When do we know what image to stop at?
Bhai Apke pass physical chemistry ka 19 20 21 ka previous year solution hai kya chapter wise...?????
same q...sir kindly clear the doubt🙏
Did u get it now? If yes, pls tell?
@@niharikakhanna3585 30:20 sir Qno 10 me pta kaise pda ki ye object infinity pe rkha hua h or hme usi ka formula lgana hai....?????? If u know please ans me
@@amitranjan1694 if nothing is mentioned we consider the object to be at infinity
27:21 sir aapne u negative kyu lia wo to ab lens ke right side m h na so postive u hoga na
Aur sir kaise pta chalta h ki relection kitne round karana hota h ?
5:21,13:00, 25:01,37:41 ,48:00
The way Mohit sir explain everything is just outstanding and became very easy for us to understand the concepts
very good dear
keep learning and solving
Q-3,5,8,9[SEE],12,16[SEE],18
well done on completing it
keep learning and solving
28:39 sir in question 9, how do we know kitne reflections/refractions karwaane hai, and in question it is also not specified ki image distance lens se ya mirror se leni hai?
11:26 sir my coaching teacher explained it very pathetically, he didn’t use the fact of 2pi*r*h , I’m happy to know that this is simple logic. All thanks to you.
most welcome dear
28:07 dear sir,how would i know that how many reflections i have to consider in multi lens/multi mirror problems.....like here u consider 3 reflection....but after the formation of I[3] image why we won't consider the 4th reflection in the lens..........plzzz help me sir
after final refraction from lens, rays wont further interact with any device
RAY OPTICS REVISE ❤
DOUBT QN: 5:45 NEXT LEVEL
25:00 Graph
26:11 Final img problem
33:23 Once again.
43:11 New formula
great work
keep solving & learning
#learnlikeneverbefore
22:23 Thanks sir 🙏 was looking for a solution for this question ... Everybody else either made it too complex or solved it wrongly but i knew that Mohit sir might have solved it in one of his session and as expected your solution was simple and clear ....thank you again ❤
29:53 optical instrument
Next just next to it is also of optical and last q 18 too ia on optocal instrument
revision : 14:12 22:22 44:31
5:25 34:00 10,11,16-18
well done on completing it
keep learning and solving
Sir optical instrument pr full detail video bana dijiye uske formulas learn krne me problem ho rhi he please
Revise
Ray optics
6:09
33:39
39:13
well done on completing it
keep learning and solving
I don’t comment anything usually but it’s heartwarming to see Sir just commenting on almost all of my comments from the past few days , thank you sir✨💗
33:00 good ques once again. 47:09 good
33:14 What a great explanation sir, my coaching is really pathetic 😒 Why didn’t i find your channel 1 yr before atleast 😢
33:17 5:44 14:19 22:25 30:47 40:59 42:42
sir at 14:00 answer should be magnified n??
5:23,22:22,25:23,33:19,38:49,41:54,30:48 ,45:16
for my revision
14:13
22:15
25:29 i2 ka refraction agaian
33:26
46:00
Sir I really loved that visualization of spherical cap ( % of light emerging) 🔥🔥 that was really a tough question
lovely dear
keep solving & learning
& welcome to the era of true learning
#learnlikeneverbefore
Sir i bit confused on formulae used in optical instrument Q between when we use relax case and when at D, ex like Q 10 and 11.
32:20 sir how to know whether we have to take image at d formula or image at infinite formula?
They didn't mention the case, the just used compound microscope. We should use max magnification case so we should take D/f+1
Q12 37:40
8:53
17:02
19:39
26:09
33:24
7:00 approach
well done dear
keep solving & learning
#learnlikeneverbefore
what a visualisation...hatss of to you sir ❤❤
#learnlikeneverbefore
@28.26 bhaiya 3 to right side hai to usko positive lenge na???
27:00 the object distance should be positive right? since the object is placed on right side of the lens
the sign convention followed here is different dear
@@mohitgoenka99 ok thank you sir for your reply
38:30 it should be -1 because..there will be a - before v^2/u^2
Questions asks speed and not velocity that is why only magnitude is written.
@@mohitgoenka99 ok sir thanku❤️
Wow some really good questions in 2020
Q3 (5:45)
In 12th ques 35:52 why cant we use apparent depth formula
Because apparent depth formula is valid only when observer is placed perpendicularly or the angle of refraction is very small..
Done!! ❤️❤️
Sir ye jo questions me diagram hai vo question me dia hota hai???
yes
@mohitgoenka99 👍❤️
28:42 pe hume kese pata lgega ki que ko kitni images k baad end krna h
Banane ko to last image bhi mirror k liye virtual object ka kaam kr skti thi
Last Image I3 can not act as object for mirror. If I3 were formed behind the mirror then it would act as virtual object for mirror.
Bhai Apke pass physical chemistry ka 19 20 21 ka previous year solution hai kya chapter wise...?????
9:23 , 36:24 , 43:15 ,47:56
Sir currently I'm studying ray optics. I already have basic ncert knowledge of the complete chapter. At this time round should I solve my coaching sheets or last 20 years PYQs..
Last 20 yr pyq
@@mohitgoenka99 thank you sir 🙏
Thank you sir . It was easy to understand . Thank you for improving my confidence.
Always welcome dear
5:45[Good Question]
very good dear
keep learning and solving
27:23 Sir why won't we take u as +3 ???????
sir in question no. 11 you have used formula for image at D but it is not mentioned in the question
But sir if nothing is mentioned in question we generally take formula for image at infinity?🤔
Sir in Q11 at 33:03 why didnt u use L/Fo x D/Fe
You are best physics teacher ❤😊 you have raise my level of confidence in this chapter
Glad to hear that
I referred following qtns
Q2,3,4,,5,8,9,14 though I felt easy after ur solution .
And in 11th i forgot that d 25cm
Rest all r doable revise ,
well done dear
#learnlikeneverbefore
Now it time to start wave optic
More logical question as compared to other years thankyou!
revision questions
Q3
Q8
Q9
Bhaiya agar kuch nai dia hai to microscope or telescope me konsa wala case le normal adj yaa D wala
D
3 thoda tricky
5 new concept
8 bn to gya par repeat krna hai
9 mirror k image ko hi final man liye the
12
13 straight formula
14 good question
16 new concept
very good dear
keep learning and solving
10:20
23:50
15:40
22:14
hood
We want more such videos like most repeated concept and PYQ Thank you sir
Bhai Apke pass physical chemistry ka 19 20 21 ka previous year solution hai kya chapter wise...?????
@@amitranjan1694 yeas I use Oswaal for that
27:25 sir why you have taken -3
thank you sir for this session👌👌
very good dear
keep learning and solving
you are my savior sir
Glad to help !
Q3,q9,q12
[To Do again]
well done on completing it
keep learning and solving
Good questions
Q 3
Q 8
Q9
Q 12
Q 16 ❤
well done dear
keep solving, learning & revising
In ques 3 we can use the concept of power to get the same answer which is more straightforward.
My report (JEE 25):
(Ray Optics) SCORE: 10/18
Q's to Repeat: 3,5,8,9,12,14,16,(Formulae: 10,11,12)
very good dear
keep learning and solving
Q3
Q8 Graphical
Q9 easy but good
Q12
very good dear
keep learning and solving