What is the vector part of e1 normal to the interface

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Reference no: EM13265222

If one of the normal vectors to an interface is n-hat = 1/sqrt(13) (3x-hat + 2z-hat) and the electric field just below the interface is E1 = 9x-hat + 2y-hat + 2z-hat, what is the vector part of E1 normal to the interface?

Reference no: EM13265222

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