help needed in Phy oct/nov 09 P-22!!!!!!!!!!!

[Harvard_gal]

hi ppl..........

plz help me out wit phy oct/nov 09 p-22, qstn no. 5(b)................mark scheme says 180 degrees but im getting 270 degrees!!!!

 

[azfar kashif]

but itx really simple........ Bothe points X and Y are the same distance apart from the start and end of the wave...... i.e: (1/8 L)..... so, they have to be in phase difference of 180 degree

 

[new2sys]

@azfar: i dont get the logic unfortunately

 

[ashhadazam]

I dint get this one too.. !!! my answer also coming 270.. by 2pi x/ lamda .. Kindly explain someone :/

 

[beacon_of_light]

If this question shows the formation of a stationary wave since it is reflected from a fixed end, then the phase difference would be 180 degrees...cos all points b/w two nodes have a pi radians or 180 degress phase differnece with the adjacent points on the nxt two nodes...hope u get that!!!

 

[Azazel]

Another way of understanding this part is:

If you add the amplitudes of both together (which are the same, but in opposite directions), your answer will be zero. This shows a destructive interference (per say) and hence a phase difference of 180 deg/ pi radians.

 

[beacon_of_light]

so this means all points b/w nodes have zero phase difference but are at a pi radians phase difference from the points in the nxt two nodes........

 

[ashhadazam]

so this means all points b/w nodes have zero phase difference but are at a pi radians phase difference from the points in the nxt two nodes........

Zzzz =ss !!! U mean to say that the phase difference is pi from th points in the next two nodes regardless of the distance from the fixed points ???? :sss ! U CANT GET A phasdifference of 0.5pi in a stationary wave ???? that is wt u meant by this or i understud wrong :roll: :roll: :? :?
We never did something like this in our scl :S