edit: Thank you to all who answered! I’m amazed at how many ways you came up with to answer this.

  • theunknownmuncher@lemmy.world
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    2 months ago

    The mirror DOESN’T flip left and right. Imagine an x-axis as a horizontal line across the mirror, a y-axis as a vertical line up/down the mirror, and a z-axis as a line that comes straight out of/into the mirror.

    The mirror is actually only flipping that z-axis that comes out of/into the mirror, by reflecting the light back