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A ray of light falls on one of two plane mirrors placed at an angle of 90 degrees. show that the direction of the ray after two reflections is parallel to the direction of the original ray.
14 years ago

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drwls
You will find a proof at

(Broken Link Removed)
14 years ago
Garv
Vchkfvjgvogviofogucigucfyctory
8 years ago

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