Ray Optics & Optical Instruments | Class 12 Physics | NCERT Chapter 9 | CBSE NEET JEE | One Shot

Timestamps:
0:00 Introduction
0:56 Light
1:23 Light-Reflection & Refraction
1:40 Reflection of Light
3:27 Laws of Reflection
4:54 Spherical Mirrors
7:54 Spherical Mirrors: Terminologies
11:59 Focal Length of a spherical Mirror
14:37 Image formation by spherical mirrors: Rules
16:39 Image formation by Concave mirrors
33:38 Image formation by Convex mirrors
38:42 Spherical mirrors: Applications
40:59 Sign Convention for Reflection by Spherical Mirrors
42:18 Mirror Equation
44:34 Magnification of a spherical mirror
46:13 Problem1
52:15 Refraction of Light
53:25 Laws of Refraction
55:00 Refractive Index
57:59 Optical density of a medium
59:39 Rarer vs. Denser medium
1:01:11 Refraction through a glass slab
1:02:3 Real & Apparent Depth
1:05:48 Real & Natural phenomena
1:10:21 Total internal Reflection
1:20:06 TIR Application: Optical fibres
1:20:52 How Optical Fibres Work?
1:22:50 Glass vs. Plastic optical fibres
1:23:33 Optical fibres
1:24:46 TIR Application: Prism
1:25:32 Example: Critical Angle
1:29:05 Refraction at a spherical surface
1:34:25 Lens
1:36:09 Terminologies related to Lens
1:41:40 Sign Conventions for Lens
1:46:34 Refraction by a convex lens
1:55:38 Lens-maker Formula
1:59:37 Refraction by Lens: Rules
2:02:39 Magnification of a lens
2:03:15 Power of a lens
2:05:10 Problem 1:Lens maker Formula
2:09:03 Combination of Thin lenses in contact
2:10:54 Problem 1:Combination of thin lenses
2:16:15 Prism
2:19:19 Refraction by Prism
2:27:46 Relation between Angle of deviation & incidence
2:31:10 Refractive index of the material of the prism
2:34:35 Dispersion by Prism
2:36:29 Rainbow
2:38:10 Primary rainbow Formation
2:42:02 Secondary rainbow formation
2:43:14 Optical Instruments
2:43:58 Components of Eye
2:51:43 Image formation by Eye
2:56:47 Least distance of distinct vision
2:59:49 Defects of vision
3:00:29 Myopia
3:02:56 Hypermetropia
3:03:53 Astigmatism
3:04:59 Presbyopia
3:06:39 Problem 1:Eye defect
3:09:14 Microscope
3:10:21 Simple Microscope
3:12:05 Limitations of a Simple Microscope
3:12:43 Compound Microscope
3:18:29 Telescope
3:19:05 How does a telescope work?

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[shakalaka_boom]

For 2024 students,

1. Advance sunrise and delayed sunset 1:05:55
2. Dispersion by prism 2:34:35
3. Rainbow 2:36:29
4. Eye 2:43:58

These topics are deleted from NCERT

[Likhisri]

Timestamps:
0:00 Introduction
0:56 Light
1:23 Light-Reflection & Refraction
1:40 Reflection of Light
3:27 Laws of Reflection
4:54 Spherical Mirrors
7:54 Spherical Mirrors: Terminologies
11:59 Focal Length of a spherical Mirror
14:37 Image formation by spherical mirrors: Rules
16:39 Image formation by Concave mirrors
33:38 Image formation by Convex mirrors
38:42 Spherical mirrors: Applications
40:59 Sign Convention for Reflection by Spherical Mirrors
42:18 Mirror Equation
44:34 Magnification of a spherical mirror
46:13 Problem1
52:15 Refraction of Light
53:25 Laws of Refraction
55:00 Refractive Index
57:59 Optical density of a medium
59:39 Rarer vs. Denser medium
1:01:11 Refraction through a glass slab
1:02:3 Real & Apparent Depth
1:05:48 Real & Natural phenomena
1:10:21 Total internal Reflection
1:20:06 TIR Application: Optical fibres
1:20:52 How Optical Fibres Work?
1:22:50 Glass vs. Plastic optical fibres
1:23:33 Optical fibres
1:24:46 TIR Application: Prism
1:25:32 Example: Critical Angle
1:29:05 Refraction at a spherical surface
1:34:25 Lens
1:36:09 Terminologies related to Lens
1:41:40 Sign Conventions for Lens
1:46:34 Refraction by a convex lens
1:55:38 Lens-maker Formula
1:59:37 Refraction by Lens: Rules
2:02:39 Magnification of a lens
2:03:15 Power of a lens
2:05:10 Problem 1:Lens maker Formula
2:09:03 Combination of Thin lenses in contact
2:10:54 Problem 1:Combination of thin lenses
2:16:15 Prism
2:19:19 Refraction by Prism
2:27:46 Relation between Angle of deviation & incidence
2:31:10 Refractive index of the material of the prism
2:34:35 Dispersion by Prism
2:36:29 Rainbow
2:38:10 Primary rainbow Formation
2:42:02 Secondary rainbow formation
2:43:14 Optical Instruments
2:43:58 Components of Eye
2:51:43 Image formation by Eye
2:56:47 Least distance of distinct vision
2:59:49 Defects of vision
3:00:29 Myopia
3:02:56 Hypermetropia
3:03:53 Astigmatism
3:04:59 Presbyopia
3:06:39 Problem 1:Eye defect
3:09:14 Microscope
3:10:21 Simple Microscope
3:12:05 Limitations of a Simple Microscope
3:12:43 Compound Microscope
3:18:29 Telescope
3:19:05 How does a telescope work? THATS IT. khel khatham dukhan bandh

[sobiafatima]

Something in life never ends 1. Ray optics
2.Electrostatic
3.p block

[pulkithanda]

For 2023 Board ppl: We only have to do till 2:36:29 Rainbow
Then from 2:43:14 Optical Instruments to 2:43:58 Components of Eye (Good Luck)
2:43:58 Components of Eye - 3:06:39 Problem 1:Eye defect (deleted) 👍🏻
Finally from then on till the end. Astronomical telescope not in this video.

[anshukishan]

3 day's before exam waale 😅 is line me aa jaaye 😂😂

[bajrang]

I started watching exam fear from 2014 .
The only teacher who taught all class from 6- 12 absolutely free and that also with mind-blowing teaching style.
The true educational revolution started by exam fear only.
The single lady teacher who taught physics chemistry biology of class 6 7 8 9 10 11 12.
No teacher has broken this record and will not break it.

[Rushikesh-bfgk]

0:00 - 52:15 (Part 1)
52:15 - 1:10:21 (Part 2)
1:10:21 - 1:29:05 (Part 3)
1:29:05 - 2:16:15 (Part 4)
2:16:15 - 2:36:39 (Part 5)
2:36:39 - 3:09:14 (Part 6)
3:09:14 - 3:23:27 (Part 7)
I've divided chapter into 7 parts according to my convenience, maybe it would be helpful to others too i guess.

[Xyzrutfrj]

For those unable to recall triangle law I have an alternative 02:22:08 method to prove delta=angle 1+ angle 2
First let's take the 3rd angle of triangle MQR be angle 3
now we know straight line 180°
angle delta + angle 3= 180°
Angle 3 = 180 - angle delta ...(1)
Now in triangle MQR we have angle 1+angle 2+angle 3 =180° (because all angles of triangle=180°)
Now angle 1+angle 2+180° - angle delta = 180° {from ...(1)}
Now angle 1+angle 2 - angle delta = 180°-180°
Angle 1+angle 2=angle delta
And hence proved

[Fireedittz]

I hope the person who see this comment will perform better in physics exam....All the best❤

[sankalpsahu]

For CBSE .. the syllabus starts from
52:15

[captaina.t]

Can we just appreciate ma'am for not putting any ads in the entirety of the video so that we can study peacefully?!👏👏

Edit: It's 100% okay to add ads in your video as she needs to work out her expenses too, but I'm just appreciating the fact that she hasn't so that we can watch her videos peacefully

[sguroyn]

41:52 in the image distance towards right of the pole is given -ve but it will be +ve

[satvikverma]

Legends starting ray and wave optics now

[shivangi]

mam😩i am proud of me for completing watching this lecture and making amazing notes and solving question! thank you so so sooo much for this lecture. You even my mummy watches your lectures so that she could explain these concepts to me if i have a problem and she constantly appreciates you for making all of this so easy.

[sarthakchhabra]

For cbse start 52:44 and skip eye part from 2:44:00 to 3:09:14

[Akanksha_]

There are no words to explain your efforts...
Thnks to you ma'am nd your team ❤️ also the entire lesson was amazing nd useful

[tonystark]

The animator or editor behind this video has done a great job. It's different from the other videos and mam has taught well too❤

[pavneetsingh]

For cbse batch 2021-2022 topic covered in between 2:34:36 - 3:09:18 are deleted

[LokeshYadav-tsoi]

Ray Optics and Optical Instruments
Refraction (delete only advanced sunrise and delayed sunset), Mirage, Diamond, Some Natural Phenomena due to Sunlight, The Rainbow, Scattering of Light {deleted topics} for boards 2023-2024

[nitinrai]

2022-23 batch wale attendence please 🙏