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Physics: Post your doubts here!

M

Mohammed salik

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mehria said:
when amplitude is doubled then intensity increases 4 times... n when the distance frm the source is doubled then intensity decreases by 4 times...
because intensity is directly proportional to (amplitude)^2 and it is inversely proportional to (1/distance frm the source)^2
Click to expand...
Wah Wah..! :p :p
Scientific Method :p! :)
 
Suchal Riaz

Suchal Riaz

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ZaqZainab said:
Thanks :) My way was a different one how do i know my way is wrong :(
Click to expand...
you assumed that the particle was still moving while it had stopped moving at maximum point so the velocity was zero. it means all of the kinetic energy is changed into other forms of energy.
we can easily see that the potential energy has increased.
but the potential energy has not changed by same amount.
the rest went to the internal energy/doing work against air resistance.
 
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Mohammed salik

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mehria said:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_21.pdf

Q5 (c)
Click to expand...
As it Goes away Reading Decreases And reaches Minima Then start to Increase Uptil NExt Maxima.! Last Maxima will be At P! Then there will be many Maxima/Minima In between P and O!
now u can See from Figure the Path difference is 0.15 (0.9-0.75). And wave lenght we calculated Is 0.025..
So 0.15/0.025= 6 Wavelengths.. Meaning 6 Maxima And Minima! We add one Maxima At O (where Path diffrence is O) to make it 7 Maxima And 6 Minima..!
Samjh Aya .. Or u need detailed Explaination :p!
 
mehria

mehria

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Mohammed salik said:
As it Goes away Reading Decreases And reaches Minima Then start to Increase Uptil NExt Maxima.! Last Maxima will be At P! Then there will be many Maxima/Minima In between P and O!
now u can See from Figure the Path difference is 0.15 (0.9-0.75). And wave lenght we calculated Is 0.025..
So 0.15/0.025= 6 Wavelengths.. Meaning 6 Maxima And Minima! We add one Maxima At O (where Path diffrence is O) to make it 7 Maxima And 6 Minima..!
Samjh Aya .. Or u need detailed Explaination :p!
Click to expand...
no i need a detailed explanation :p just kidding...thnx..it was helpful :)
 
ZaqZainab

ZaqZainab

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Suchal Riaz said:
you assumed that the particle was still moving while it had stopped moving at maximum point so the velocity was zero. it means all of the kinetic energy is changed into other forms of energy.
we can easily see that the potential energy has increased.
but the potential energy has not changed by same amount.
the rest went to the internal energy/doing work against air resistance.
Click to expand...
i assumed the this was suppose to the k.e but this was lost because of the air Resistance
 
I

IGCSE13

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Can someone show me the drawing of demonstrating diffraction using light waves pleaseee it is urgent ?????
 
omaaaar

omaaaar

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Outline briefly an experiment that may be used to demonstrate diffraction of a transverse wave
 
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