It changes the angle of the mirror such that you see the
reflected image (from where?) instead of the direct image
if the original image u r looking at in the mirror is a direct
image, then why is it called a reflection? o.0 and if that's a
reflection.. what reflected image r u referring to?
sorry but i realli dont understand ur sentence..
as far as i know.. the primary mirror is the silver layer in the
mirror assembly and when u tilt it u are viewing the secondary
layer which is the glass..
wait i try to get a wikipedia explaination..
Wikipedia - Dimming
A traditional rear-view mirror can be tilted to reduce the
brightness and glare of lights, mostly for headlights shining
directly on the eye level at night. This manual tilt mirror is made
of a piece of glass that is wedge-shaped in cross sectionits front
side and back (silvered) side are not parallel, unlike normal
mirror glass. In the default day view, the front side is tilted and
the back side (which has a reflective coating, usually with silver
like a mirror) is head-on and will give a strong reflection. When
the mirror is tilted, its front side is head-on and the back is
tilted. This view is actually a reflection off the clear, front
piece of the glass rather than the back silver-coated part. Since
the front part allows most of the light to go through, only a small
amount of light is now reflected into the driver's eyes.
Some rear-view mirrors have electronic auto-dimming features built
in (mirrors with automatic anti-glare function) while others are
adjustable so that a lower light level setting may be used. Because
of this it is advisable to set the darker setting to be aimed lower
in the car than the lighter setting. This is mostly because at
night when you readjust the mirror to use the darker setting the
lighter angles will be pointed to the lower contrast roof of the
vehicle instead of the higher contrast areas such as the backs of
the seats.
Src: http://en.wikipedia.org/wiki/Rear-view_mirror
