Talk:Compound prism

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Failed to parse(unknown function '\begin'): {\begin{aligned}\theta _{1}&=\theta _{0}-\beta _{1}&\theta _{3}&=\theta '_{2}-\alpha _{2}\\\theta '_{1}&=\arcsin({\tfrac {1}{n_{1}}}\,\sin \theta _{1})\quad &\theta '_{3}&=\arcsin(n_{2}\,\sin \theta _{3})\\\theta _{2}&=\theta '_{1}-\alpha _{1}&\theta _{4}&=\theta '_{3}+{\tfrac {1}{2}}\alpha _{2}\\\theta '_{2}&=\arcsin({\tfrac {n_{1}}{n_{2}}}\,\sin \theta _{2})\end{aligned}}

I am running the latest chrome with no script blocking.

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