If \(A^\mu\) and \(B^\mu\) are light like four vector show that \(B^\mu A_\mu=0\) if and only if \[ A^\mu = \text{constant} \times B^\mu\]
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4727:Diamond Point
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If \(A^\mu\) and \(B^\mu\) are light like four vector show that \(B^\mu A_\mu=0\) if and only if \[ A^\mu = \text{constant} \times B^\mu\]
4727:Diamond Point