Question

Why does a flat mirror appear to reverse the person looking into a mirror left to right, but not up and down?

Answer 1

Your right hand would be on the right side still. However, your back would be facing towards where the mirror was, not your front. So, mirrors flip front and back.

Answer 2

Mirrors do not reverse left and right and that they do not reverse up and down.

• Reversing left and right is termed a reversal on the horizontal axis. However, a mirror conjointly reverses pictures in an exceedingly front-to-back fashion. this implies that if you’re inform north, your alikeness is inform south.
• Standing before of a mirror, after you move your hand (RY’s hand) to your east, for certain, MI’s hand conjointly moves towards the east. one thing similar happens once RY’s hand goes up; MI’s hand conjointly goes up! this is often as a result of these directions lie on a plane that's parallel to the mirror.
• MI looks to follow each motion of RY, as long as it’s in an exceedingly direction that lies on a plane parallel to the mirror.
• Now attempt this; change front of a mirror and purpose towards the mirror (let’s say you’re inform north). during this case, though RY is inform north, MI is inform within the other way, i.e. south.
• The coordinate axis of the person are going to be shown within the other way from the attitude of the person however within the same direction within the perspective of the mirror.
• Â this implies that the proper hand of the person are going to be mirrored on the right-hand aspect of the mirror from the person’s read, however the mirror can mirror the image because the person’s left as he appearance at himself within the mirror.
• So the mirror is reflective the image of the item within the same position wherever it exists. we have a tendency to see it as reversed as a result of the image within the mirror is really facing America, and our right should be the mirror image’s left. it's a theory of opposites in reverse. that's why the mirror reflects the image  and causes it to seem as reversing right and left.

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