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As the title says, how would I obtain the vector $\mathbf t$ if the vector $\mathbf i$ and the refractive indices are known? I've tried for hours but I keep getting stuck. Is there an equation readily available?

Thank you.

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  • $\begingroup$ Related: physics.stackexchange.com/questions/435512/… $\endgroup$
    – d_b
    Oct 22, 2020 at 20:29
  • $\begingroup$ In what system do you know the vector i? do you täte the normal ant tangential component as given? $\endgroup$
    – trula
    Oct 22, 2020 at 20:43
  • $\begingroup$ @trula The point of vector equations is that they don’t require a particular coordinate system. $\endgroup$
    – G. Smith
    Oct 23, 2020 at 21:19

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