Need help with an equation

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Fahim
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Need help with an equation

Unread post by Fahim » Sun Jan 01, 2012 5:18 am

I didn't where to post this, but anyway I was reading Zafar Iqbal's book on theory of relativity @ http://www.deshiboi.com/listing_summery ... ing_id=581 and One thing I didn't get is this at page 11 it says
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the page I'm talking about
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\[t=\frac{\sqrt{v^2t^2+D^2}}{c}\]

that can also be written as
\[c^2t^2=v^2t^2+D^2\]
or
\[c^2-v^2=D^2\]

How do you get the third result \[c^2-v^2=D^2\] from? :?:

I know I am missing something, can you guys help me? Thanks

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Moon
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Re: Need help with an equation

Unread post by Moon » Sun Jan 01, 2012 10:53 pm

Apparently this is a typo. We have $(c^2-v^2)t^2=D^2$. In fact, $c^2-v^2=D^2$ is dimensionally incorrect.
"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin

Please install LaTeX fonts in your PC for better looking equations,
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sm.joty
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Re: Need help with an equation

Unread post by sm.joty » Sun Jan 01, 2012 11:02 pm

আমার জানা মতে এটা একটা প্রিন্টিং মিস্টেক। (মুন ভাই যেটা বলল)
খেয়াল করলে দেখবা মিউওন এর কথা লেখার সময় কিন্তু এমন একটা ভুল আছে।
হার জিত চিরদিন থাকবেই
তবুও এগিয়ে যেতে হবে.........
বাধা-বিঘ্ন না পেরিয়ে
বড় হয়েছে কে কবে.........

Fahim
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Joined: Sun Jan 01, 2012 5:02 am

Re: Need help with an equation

Unread post by Fahim » Sun Jan 01, 2012 11:58 pm

Thanks so much @Moon and @sm.joty

It makes sense now. @sm.joty can you also tell me typo for Muon, Thanks!

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sm.joty
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Re: Need help with an equation

Unread post by sm.joty » Mon Jan 02, 2012 1:46 am

Actually at this moment I haven't the book. So can't help you now but if you read carefully all the equation then you will find a bug in "MUON". :D
হার জিত চিরদিন থাকবেই
তবুও এগিয়ে যেতে হবে.........
বাধা-বিঘ্ন না পেরিয়ে
বড় হয়েছে কে কবে.........

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sm.joty
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Location: Dhaka

Re: Need help with an equation

Unread post by sm.joty » Wed Jan 04, 2012 12:01 pm

sm.joty wrote:Actually at this moment I haven't the book. So can't help you now but if you read carefully all the equation then you will find a bug in "MUON". :D
Oups there's a grammatical mistake. :D
Whatever actually this time I don't have this book so I can't help you @Fahim. :oops:
হার জিত চিরদিন থাকবেই
তবুও এগিয়ে যেতে হবে.........
বাধা-বিঘ্ন না পেরিয়ে
বড় হয়েছে কে কবে.........

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