Spin up exam 1, problem 2

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Redskinsdb21

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IT has 2 diagrams, asks which sequence they are +, or -..one looks + and the other looks - to me, whats wrong here? answer says +

 
I don't have it in front of me, but I think you need to imagine yourself standing next to the diagram, and spin the phases in the direction of the arrow and if they

are "ABC, it is positive, but if they spin "BAC" it is negative.

 
I don't have it in front of me, but I think you need to imagine yourself standing next to the diagram, and spin the phases in the direction of the arrow and if they

are "ABC, it is positive, but if they spin "BAC" it is negative.
Thats just it, they spin in opposite directions?

 
Redskinsdb21,

It is not if they spin with or against each others. there is a small round arrow indicates the rotation of each diagram.

if you follow the direction and the sequence was a-b-c-a-b-c it is positive sequence:

if teh sequence is a-c-b-a-c-b it is negative sequence

 

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