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Cross Product Fun

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1. Homework Statement

1 [tex](H_1 - H_2) \times \hat n = J_s[/tex]
2 [tex](H_1t - H_2t) = \hat n \times J_s[/tex]

How does one get from the first statement to the second statement?

3 [tex]H_{1t} - H_{2t} = J_s[/tex]

This is causing an interesting problem when I plug in numbers, I would have just left it with statement (3) but if I do I get something completely different. My book gives (2) but doesn't explain how it derives it.
 

Answers and Replies

Dick
Science Advisor
Homework Helper
26,258
618
If the 't' means 'tangential' part use ax(bxc)=b(a.c)-c(a.b). The H part becomes H minus the normal component of H.
 
Last edited:

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