Mirror image reversal - why only l/r, not up/down

In summary, mirrors only reverse an image left to right, not up and down, because when we perceive our image in the mirror, we unconsciously rotate our orientation around our vertical axis, which reverses the in/out direction at the cost of a left/right flip. This is a more natural and familiar choice due to our symmetrical nature and lack of physical rotation around our horizontal axis.
  • #1
judgecrater
1
0
what explains the fact that mirrors only reverse an image left to right, not up and down?
 
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  • #2
Mirrors don't reverse either of those.
 
  • #3
They reverse in/out. The reason it seems the left/right directions are reversed is because when we decide which hand our image is raising, we unconsciously put ourselves in its place, which involves rotating our orientation around our vertical axis so we face the same direction, undoing the in/out flip at the cost of a left/right flip (in our minds eye). We might just as easily flip about our horizontal axis and decide up/down is flipped, but since we are more or less symmetrical left to right (and also since we rarely physically perform that rotation), that is a much less natural choice.
 
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Related to Mirror image reversal - why only l/r, not up/down

1. Why do mirror images only reverse left and right, and not up and down?

The reason for this is due to how our eyes and brain process visual information. When we look at an object, our brain interprets the image and creates a mental map of its orientation. This map is based on the position of the object in relation to our body and the surrounding environment. When we see a mirror image, our brain perceives it as a reflection of the original object, therefore, it appears reversed from left to right. However, the up and down orientation remains the same because our brain does not perceive the mirror as a physical object that can be rotated.

2. Is there any scientific explanation for why mirrors reverse left and right?

The phenomenon of mirror image reversal is a result of the law of reflection, which states that the angle of reflection is equal to the angle of incidence. This means that light rays bounce off a mirror at the same angle at which they hit it. As our eyes receive the reflected light, our brain interprets it as the reverse image of the original object.

3. Can mirror image reversal be influenced by the shape or type of mirror?

Yes, the shape and type of mirror can affect the perceived direction of the reversed image. For example, a convex mirror will create an image that appears smaller and further away, while a concave mirror will create an image that appears larger and closer. However, regardless of the shape or type of mirror, the left-right reversal will always occur.

4. How does mirror image reversal affect our daily lives?

Mirror image reversal is a natural phenomenon that we encounter daily without even realizing it. For instance, when we look in a mirror to style our hair or put on makeup, we are essentially seeing a reversed version of ourselves. This can sometimes cause confusion or difficulty in tasks that require spatial orientation, such as driving or reading maps.

5. Is there any significance to the fact that mirrors reverse left and right?

Mirror image reversal has been a topic of interest for centuries, and many theories have been proposed to explain its significance. Some argue that it is a fundamental law of physics, while others believe it has cultural or psychological implications. However, there is no conclusive evidence to suggest that mirror image reversal has any significant meaning or impact on our daily lives.

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