Zachariah@lemmy.world to Ask Lemmy@lemmy.world · edit-220 天前Why does a mirror only flip left and right but not high and low?message-squaremessage-square30fedilinkarrow-up11arrow-down10file-text
arrow-up11arrow-down1message-squareWhy does a mirror only flip left and right but not high and low?Zachariah@lemmy.world to Ask Lemmy@lemmy.world · edit-220 天前message-square30fedilinkfile-text
minus-squareBwaz@lemmy.worldlinkfedilinkarrow-up0·20 天前It’s because left/right are physical relationships that are relative to YOU. Up/down are relative to the center of the earth. Up/down are relative to you only if you aren’t upsidedown.
It’s because left/right are physical relationships that are relative to YOU. Up/down are relative to the center of the earth. Up/down are relative to you only if you aren’t upsidedown.