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Bahan-GG-2

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∆ ′zIRISAN NORMALUmumnya, irisan normal dari arah P 1 ke P 2tidak berimpit dengan irisan normal dariarah kebalikannya (P 2 ke P 1 ).Bidang normal di P 1 : P 1 –n 1 –P 2Bidang normal di P 2 : P 2 –n 2 –P 1zn=ae2sin ϕp(2 2)1/ 21−e sin ϕpBila kedua titik tidak terletak pada bujur dan lintang yang sama, maka :z ϕ1 p 2

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