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4:30 PM
Hey
Rajdeep
4:51 PM
Hi @Mayank
Sorry for not being able to chat earlier
5:18 PM
Hey
How are you?
Hi
Great, what about you?
So, did you want to discuss something?
Bad
Oh, what happened?
I want to ask you How you cope up with school?
And curiosity knowledge
Well, it's obviously not easy
Do you mind if I tell you after 5 minutes?
I'm a little busy
5:20 PM
Yes
Ok
I promise I will tell you
5 min later?
Hi
So, ask me whatever you want to @Mayank :)
5:27 PM
How you cope up with school?
I don't, simple. I don't pay much attention to school
By school, do you mean subjects that you're not interested in?
I hate SST
I also hate sst bio
I hated Bio
English hindi sankrit
I like it now
I like English
5:29 PM
@RajdeepSindhu why Is that so?
I love Maths, Computer Science, P and C
@Mayank Well, it's still Science
I like the understanding part of it
Not the rote-memorization part..
I don't like english
Because of the way it is taught in india
We are forced to learn a lesson
Do you make school notebook?
Yeah, lol, have to, unfortunately
I don't like the way it's taught, either
I love the language and how it helps to better understand logic (to me, at least)
I saw some of your questions
@RajdeepSindhu yes
I love the language in that way
Thank You :)
Did you like the questions?
5:32 PM
Have you done calculus?
@RajdeepSindhu yep They were amazing
Basics, for Physics
Have you done electricity of 10th?
@Mayank Thank You!
@RajdeepSindhu i did some basic of calculus in 9th for 11th physics but I don't know a word now
@RajdeepSindhu i just hate class 10 physics
It is bogus
Don't you think that?
@Mayank well, you didn't pay much attention, then. I hate when I forget something I did earlier
@Mayank Not at all
Well, which part is bogus?
@RajdeepSindhu I think they should include basic first
The topics which are in10th
Well, that is true
5:34 PM
Just look at Snell's law
They are actually explained way later
I get you
I know
We are just taught the formula
It is derived using calculus
The way the contents of 10th are taught is bogus
And we dont know how that came up
the contents are not, I think
I get your point, Mayank
5:35 PM
Fermat principle
@RajdeepSindhu yes
Yeah, shortest path on the basis of time...
That's why I learned calc
So that I can finally understand the electricity from 12th
When I read class 10 physics from richard feynman notes I found it too exciting
Class 10 from RF!?
I read about snells law in it
@RajdeepSindhu some tits and bits
Not the whole
@Mayank Well, which book?
5:36 PM
There is a website caltech.feynman
Usme richard Feynman ke lecture h
I'll check it out
Anyway, a lot of things in optics are also not proved
Do you mind if i talk in Hinglish?
In reflection too
@Mayank I don't.
I can type faster in that
But I will talk in pure English
What are you learning new now?
@RajdeepSindhu ok
So, a lot of things like : The rays parallel to principal axis actually do meet at a point are also unproved
Do you know that in the case of reflection from a concave mirror, the rays actually do not meet at a point?
5:38 PM
@RajdeepSindhu but not always
@RajdeepSindhu yes i know
Can you prove it?
If distance of rays is more from principal axis then rays will not meet at focus
I know, but can you prove it?
@RajdeepSindhu experiment based proof
5:39 PM
But not theoritical
Mathematical
@RajdeepSindhu I don't know
I proved it
Maybe maybe not
I used my knowledge of trigonometry of 11th to prove it
5:40 PM
We can use angle of reflection and angle of incidence
Man, it was fun
@Mayank Yeah
@RajdeepSindhu Oh why I didn't joined stack exchange before!
I made a formula that gives the equation of the reflected ray if the incident ray is parallel to the PA and it's height and radius of curvature of concave mirror are given
@Mayank lol :)
Wait
I posted about it on Physics SE
Want the link?
5:42 PM
Did you use radius
Yes of course
What?
4
Q: Proof that all rays parallel to the principal axis meet at the focus during reflection from a concave mirror

Rajdeep SindhuI was trying to prove that during reflection from a concave mirror, all rays parallel to the principal axis will meet the principal axis at a point (focus) that is equidistant from the centre of curvature and the pole. I thought of proving this using coordinate geometry (and some trigonometry). I...

What do you mean by "Did you use radius?"?
Yes
From centre of curvature
To curcle
If radius is large
Then the rays will pass throught centre of curvature
And I don't really get what you're saying, sorry
5:44 PM
Leave it
Have you proved anything else?
Oh, okay
@Mayank Related to?
Physics
3
Q: Find the value of $n$ if $\frac{a^{n+1}+b^{n+1}}{a^n+b^n}=\frac{a+b}{2}$

Rajdeep SindhuNow, this question looks simple, it did to me too, at first, but I got stuck at a point and can't get out. This is how I did it, take a look : $$\dfrac{a^{n+1}+b^{n+1}}{a^n+b^n}=\dfrac{a+b}{2}$$ By cross multiplication, we get : $$2a^{n+1}+2b^{n+1}=(a+b)(a^n+b^n) = a^{n+1}+b^{n+1}+ab^n+a^nb$$ ...

How is this related to calculus?
@Mayank What about this?
No
Precalc is basically algebra
@Mayank Yeah
Mostly about optics. That in a parabolic reflector, the rays actually do meet at a point
That the stuff they tell us about in refraction is also just a paraxial approximation
I have done more in Maths. I love to explore Maths
And about what you asked earlier
5:47 PM
I am doing number theory in maths
I am currently doing calculus for Physics and electric field and potential from 12th, acids and bases revision from 10th in Chem and trigonometric equations, class 11 in Maths
Cool
But number theory seems boring
It isn't
It gives a great sense of proofs
Have you done electricity?
From 10th? Yes
5:49 PM
@RajdeepSindhu it is all about proof
With a ton of doubts
@RajdeepSindhu when do you sleep?
@Mayank Yeah, makes it great...
@RajdeepSindhu what doubt?
@Mayank 12 or 1
5:49 PM
Ok
I sometime sleep at 3
@Mayank Doubts about electricity. There are a lot of them
@Mayank Wow, when do you wake up?
Tell 1 doubt
@RajdeepSindhu It is not fixed
When I sleep early,i wake early
Otherwise 8 or 9
Well, do you know the definition of voltage? The work done by an external agent in bringing a unit charge from infinity to that point without any acceleration, right?
@Mayank Would you call 3 am late or early, lol?
@RajdeepSindhu dont know
Well, how would one factor in the change in kinetic energy if the external agent brings the charge with non-negligible acceleration?
@Mayank I don't even remember all my doubts right now...
They keep coming when I read the chapter...
5:53 PM
I just read the potential difference concept fromphysics classroom
@RajdeepSindhu Hey where the acceleration came from?
@Mayank Nice website
I didn't think about it
@Mayank Think about acceleration?
@RajdeepSindhu atleast i get a rough idea
Potential difference is the potential energy independent of charge
I wanted to do research on potential difference
But it is not even in 12th class ncert
And I didn't find it in the RFwebsite
It is in 12th...
5:57 PM
NCERT?
Which chapter?
I use HCV
In HCV, derivation for electrostatic potential energy is given
But Voltage is potential difference
Yeah, so?
It can be derived from that...
You should ask doubts from john
I exactly dont remember his name
He is in h bar physics room
6:02 PM
Yes
I just take out class 12 NCERT
Take out?
I asked my doubts from John
He suggested doing 12th
...
Do you know the page no.?
of??
Where derivation for voltage is given?
Yes
53
You found it?
6:04 PM
No
Is it in potential energy in external field
I don't get what you're trying to say...
Where is the derivation?
Electrostatic potential energy
I don't know about NCERT...
HC verma
Page number 108 and 109
HCV Part 2
6:10 PM
I have to find it
I don't know there the book is
Where*
you can actually edit your messages
Ok
Aisa lag raha h ki electricity mein kuch aata hi nhi
The whole chapter is becoming a doubt
I have to work on it.
You're going through what I went through, man
SO many damned doubts
Oh
I was living a lie
6:14 PM
I thought I knew electricity
lol
So did I
Man, we've all been there
I just hate school
A meme comes to my mind.
I don't usually curse but the meme has an image of a man saying "Those b*stards lied to me"
When are your half yearly exam?
well, my uts begin from 7th
I am aiming for a good rank in TALLENTEX
6:15 PM
Looks like I have to start from 0
@RajdeepSindhu Allen?
@Mayank You can always ask me anything :)
@Mayank Yeah
I currently self study
First I have to do self study
Well, Mayank, if you have any doubt, even the slightest
Do ask from me
Yes
I would say you start from static electricity
And think deep, deeper than Mariana Trench
6:18 PM
What is the definition of Refraction?
Please don't answer bending of light
Ask the so called stupid and obvious ques like "Why exactly is the charge of an electron treated as mathematically negative to that of a proton"
@Mayank I know the perfect answer
"Refraction is the bending of light"
I am serious
How else would you define it?
That's why I am asking
Well, that is the only definition I know
6:21 PM
Think light as a wave
Speed
Velocity
A definition which consists this
Well, speed slows down in an optically rarer medium and consequently, direction changes
@RajdeepSindhu then would you consider refraction when a ray is incident on glass slab at 90°
?
No
No bending, no refraction
Let me give you a little advice
You see, while doing a lot of chapters in 10th, a lot of things are not explained
Search on youtube
The question I asked
So, they are just to be taken for granted
Like, we are supposed to assume that those things are right and continue
6:24 PM
HCV have made a video on thia
and example would be that : Only two types of charges exist
@RajdeepSindhu yes like postulate axiom
the atomic model is right
Absolutely, you're smart :-)
So, make a list of those things
Dont tell atomic model
And complete the chapter based on those 'axioms'
Then, clarify those axioms
6:25 PM
I just hate it
Atomic model
If the are too high level, just leave those
@Mayank Why??
First we are taught the wrong thing
@RajdeepSindhu class 9 ncert chapter 4 was a lie
Yeah, yeah, the usual rant
Listen, even if a theory is wrong, it can prove greatly insightful
Plus, atomic models also teach you a general lesson
They tell you how theories go in science
You observe, you make a model to explain
you see if that model explains the observations
@RajdeepSindhu They should have taught the quantum model in the 9th
you predict something based on that model
6:27 PM
YesI know
If it is right, continue your research
@Mayank Seriously??
You sound just stupid now
What?
It is important to teach wrong models too
They are what led to the development of new, better models
Do you know, Coulomb's Law may be wrong
we have no way to find out, it is an experimental law
Yes I know
I mean thet should have taught the quantum model just after neils model
and so, we might not have tested it in an environment where it proves wrong
Would be too much for the little brains
6:29 PM
I have to do a lot of effort to understand that
Don't you think?
In 9th
@Mayank What? The qm model?
You understood it in 9th? Or did you read about it in 9th?
There's a difference...
Listen
There is a quote
Hmmmm...
Those who understand, teach, those who know, do?
6:31 PM
If a person says he understood quantum mechanics,he is a fool or he is lying.
Yeah, I know
Did you just read about it or actually thought deep was what I was intending to ask
I read about it
Quantum mechanics is a very vast topic
It might take 100 of years to understand that
Yeah, so why teach it to 9th graders?
They should have taught the basic
They should just have told that this has some limitations too
6:34 PM
So that the curiosity
@RajdeepSindhu ok
which my teacher did tell me
Anyway, bye :-)
Good night, bro
Are you joking?
Did your teacher teach that to you?
No, just told that Bohr's model isn't the end
6:35 PM
Your school must be one of the top school
Told about the existence of quantum mechanical model, that's it
I don't want to stop chatting
@Mayank No, not at all
Neither do I, but I need to sleep
But I have to make Bio notebook
At a fixed time
We can chat tomorrow
6:36 PM
Ok
Bye
@Mayank RIP, lol
Rest In power
By the way, my school isn't top or anything, nowhere close to that
Bye
Good way to turn it around
Hold on
6:37 PM
Ok
Fast
Lemme tell you one more thing
Yea
Fast
Anyway, bye
Bye

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