When studying 'Light: Reflection and Refraction' in Class 10 Physics, you will draw many ray diagrams using mirrors and lenses. The image formed by these optical devices is classified using two main properties: Is it Real or Virtual? And is it Erect or Inverted?
Convex mirrors (used as rear-view mirrors in cars) always produce Virtual, Erect, and Diminished (smaller) images, regardless of where the car behind you is located.
The human eye contains a convex lens. Therefore, the image formed on our retina is actually Real and Inverted (upside down). Our brain processes it and flips it right-side up for us.
There is a strict pair of rules in mirror and lens physics that you must memorize:
While a plane mirror forms an erect image (vertically correct), it flips the image horizontally. Your left hand appears as the right hand in the mirror. This horizontal flip is called Lateral Inversion.
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