Mirrors

[Bazile]

Why is it that the wing and internal mirrors both gives a different perception of distance ?

When i look in the internal mirror, objects appear closer than in the wing mirrors

[Khandro]

It's because you are closer to the mirror

[Buenchico]

Your car must have convex wing mirrors. (Not all cars do; they're illegal in the USA). That means that they cover a wider angle (so reducing or removing blind spots) but cramming a bigger picture into the same space means that objects look smaller, which your brain interprets as being further away.

[Bazile]

I can see why they are illegal in the US .

It can be dangerous if you forget about it and and move into the right hand lane , making your decision by glancing in the wing mirror

[oneinam]

On some car mirrors, objects appear closer in one wing mirror than the other. Further, some wing mirrors are physically smaller on the nearside (e.g. Some Mercedes) than the offside.
Furthermore, even some nearside mirrors are delineated into normal and wide angles by the structure of the mirror as regards shape and angle.

[Khandro]

Sorry, I misunderstood the question in my first post. The only way to make the field on vision larger in a mirror is to make its surface convex. In a flat mirror, the image reflected in it always remains the same no matter how near or far away from it you are.
In a flat external mirror, the 'blind spot' is increased, so an extra mirror is advisable.