# Introduction to Entropy

Hi everyone. I learnt About Entropy Today, But I didn't quite seem to Understand it. Anyone Who Can Explain It to me?Thanks In advance!

Note by Mehul Arora
6 years ago

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The entropy of this note is too damn high!

- 6 years ago

Haha, I got that xD xD xD Thanks To @Agnishom Chattopadhyay xD

- 6 years ago

Try answering the question on coins.

Not understanding Entropy is okay. It is the hardest concept in information theory and thermodynamics.

Entropy is the amount of information in a system.

Can it be equated to randomness? Yes! Because, to store more random arrangements, you need more bits. However, the more the order, the less the entropy. Why? Because to store the arrangement, you just need to know the order.

Which of the following string has more entropy? a) aaaaaaaaaaa b) xyzhwkofgbf c) aaaabbbbccc

I guess, The 2nd one. (b)

- 6 years ago

Correct.

How many bits of entropy are contained in a system containing two coins?

- 6 years ago

Kayrrect!

Have you heard of the equation S= K ln(W)?

Nope, Not ever xD xD I wanted to Learn the basics On Entropy. Like, The definition and all. Once I have the Base Strong, I shall move to the Advanced study on this topic. Thanks @Parth Lohomi @Agnishom Chattopadhyay @Raghav Vaidyanathan and @Nihar Mahajan

- 6 years ago

Try this problem: Maxwell's Demon

It explains some interesting things about entropy from an Information Theory and Thermodynamic point of view

- 6 years ago

For trying to help someone , one gets downvotes. How selfish the downvoters might be! :/ -_-

- 6 years ago

Sorry, I downvoted the comment because the thought an encyclopedia link would not be too useful

It might be useful for someone else! -_-

- 6 years ago

I agree. I just expressed my opinion. Thank you for sharing the article anyway :)

xD I know! Try My Problem! The one Inspired by you :)

- 6 years ago

I almost got it .... am working on it.. :)

- 6 years ago

I think , entropy is a measure of the number of specific ways in which a system(keep in mind that the system is thermodynamic) may be arranged.

- 6 years ago

In which class are you? @Mehul Arora

- 6 years ago

@Parth Lohomi , Class 9 Now. :D

- 6 years ago

Preparing for RMO, best of luck....[ I will not be there to congratulate you that time :(.....]

- 6 years ago

Best of Luck to you! :D :D

- 6 years ago

Are you done with the explanation?

- 6 years ago

Not yet. :/

- 6 years ago

Let's tell you more

$\triangle S=\displaystyle\int \dfrac{dQ_{rev}} {T}$

$\triangle S$ is change in entropy...

$T$ is absolute temperature

- 6 years ago

Went tangentially over my head xD

- 6 years ago

Typo should be "tangentially"

- 6 years ago

- 6 years ago

Haha...

- 6 years ago

I see!! XD...

- 6 years ago

Hey parth! accept my request on fb.Thanks

- 6 years ago

You happy now? c'mmon find the reason..

- 6 years ago

Find the reason? For what?

- 6 years ago

In which class are you

- 6 years ago

I entered 10th std. BTW how ur age changed from 14 to 13? xD

- 6 years ago

BCos i am actually 13 XD

- 6 years ago

Oh! How u be so intelligent even if ur so young? You will crack IIT for sure with good rank. :)

- 6 years ago

I am not "so intelligent"... Just an average guy.. And for the IIT stuff i will try my best... (see my status)

- 6 years ago

Being level 5 in calculus at age of 13! Thats so extraordinary! :P

- 6 years ago

Calculus is my favourite topic in mathematics..

- 6 years ago

Will u create your own messageboard? It will be easier for all to communicate there.

- 6 years ago

Ah ya sure! (first i want 1000 followers XD)

- 6 years ago

- 6 years ago

LOL why are u following me again? xD -_- @Parth Lohomi

- 6 years ago

Hey Sorry. I am not too much Online guy.... So am inactive but will surely accept it when I open it next time!!

- 6 years ago