Physics Confusions

[heetamlani]

Hello everyone
Can someone explain me difference between Path Difference & Phase difference????????

& i also have confusion between Torque of couple & moment

 

[utsav156]

Phase difference : it is the difference between the stages in oscillation cycle expressed in terms of fraction of a cycle i.e 360 deg or in terms of action of wavelength!!!

torque of a couple is the turning effect produced by/due to couple!!!

and yea path difference???? m hearing this word for the first tym mate m sorry i cant help ya with that!

 

[girlscampisra]

phase difference is the difference between two points in a wave or among two waves..
while path difference is the extra distance covered by one wave compared to other in slit experiments

 

[girlscampisra]

torque of couple is produced by 2 forces, while torque of moment is just due to one force..

 

[workinghard]

i wx bout 2 rply but shes most definitely rite...

 

[heetamlani]

Ok
I am sometimes getting confused between formula of torque of Couple & torque of Moment
For couple it is F x perpendicular distance between forces
for moment it is F x perpendicular distance on action of force & center of gravity
Is this Correct??????

 

[libra94]

torque is the product of 1 of the forces and perpendicular distance b/w forces
while moment is the product of force and the perpendicular distance between the force and the turning point (pivot) not the centre of gravity!!

 

[heetamlani]

Ok thank you all very much.

 

[hassam]

guyx....similarity b/w standing and progressive waves......????

 

[girlscampisra]

you mean stationary waves?
same waveforms??

 

[diwash]

both waves have definite wavelength and for both waves speed is given by the formula v= f * lamda(wave length)