Anyone good with physics? Physics Problem

[xvdarkyvx21]

Can someone help me out with my physics homework? I need to answer this question and it deals with interference. Thanks.

"The coherence lenght of a wavetrain is the distance over which the phase constant stays the same. An atom of a light source emits coherent light for 10 ns. Calculate the coherence lenght of this wavetrain. c = 3*10^8 m/s"

 

[Random Variable]

I know nothing about physics.

 

[Evadman]

I can't read that. can you unhighlight it?

 

[Rastus]

The plane takes off.

 

[lyssword]

Originally posted by: Rastus
The plane takes off.

QFT

 

[ones3k]

sure just plug it into this equation coherence = c^2 + e^(sqrt(ln(pi))) + c*sigma(i = 0 to infinity)(2/i^(1.002)) + integral(from 0 to infinity) (12424/x^2) + abcdefghijk/sqrt(z) + dslfksldkgsd



easy

 

[2Xtreme21]

While I do not know anything about that particular topic, here are some links that you may find helpful:

http://en.wikipedia.org/wiki/Coherence_length
http://www.fou.uib.no/fd/1996/h/404001/kap04.htm (Section 4.4)
http://www.liteachers.org/wankel/optics.html

Hope that helps.

 

[Furyline]

distance = rate x time

???

 

[Heisenberg]

Originally posted by: Random Variable
I know nothing about physics.

Me either.

 

[OneOfTheseDays]

buy an ageia

 

[Eeezee]

Use the book?

 

[drinkmorejava]

i just took the AP Physics test, there was only like one question on anything about light phases. In otherwords, no one cares.

 

[ArJuN]

I know some physics, atleast I'm taking it now. E = mc^2 is all you need to know. seriously. plug everything into there and you're good to go.
wtf is a wavetrain btw?

 

[xvdarkyvx21]

thanks for the website. http://www.fou.uib.no/fd/1996/h/404001/kap04.htm i believe that one has the info i need! thanks!

 

[Born2bwire]

Originally posted by: Furyline
distance = rate x time

???

Ahhaha, lucky guess.

 

[Hepafleb]

This part makes sense....

Originally posted by: ones3k
+ abcdefghijk/sqrt(z) + dslfksldkgsd

but this doesn't

Originally posted by: ones3k
coherence = c^2 + e^(sqrt(ln(pi))) + c*sigma(i = 0 to infinity)(2/i^(1.002)) + integral(from 0 to infinity) (12424/x^2)

 

[Eeezee]

Originally posted by: xvdarkyvx21
Can someone help me out with my physics homework? I need to answer this question and it deals with interference. Thanks.

"The coherence lenght of a wavetrain is the distance over which the phase constant stays the same. An atom of a light source emits coherent light for 10 ns. Calculate the coherence lenght of this wavetrain. c = 3*10^8 m/s"

If it's a phase constant then it should always stay the same 😉

 

[Born2bwire]

Originally posted by: Eeezee

Originally posted by: xvdarkyvx21
Can someone help me out with my physics homework? I need to answer this question and it deals with interference. Thanks.

"The coherence lenght of a wavetrain is the distance over which the phase constant stays the same. An atom of a light source emits coherent light for 10 ns. Calculate the coherence lenght of this wavetrain. c = 3*10^8 m/s"

If it's a phase constant then it should always stay the same 😉

Heh, but it's only constant for the 10 ns of light that was produced coherently. Seriously though, this is probably the most convoluted way you could state a d=r*t problem that I've heard.