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In Figure, P Q\ A N D\ R S are two mirro...

In Figure, `P Q\ A N D\ R S` are two mirrors placed parallel to each other. An incident ray `A B` strikes the mirror `P Q` at `B ,` the reflected ray moves along the path `B C` and strikes the mirror `R S` and `C` and again reflects back along `C Ddot` Prove that `A B||C Ddot`

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