What is Difference Between Back Surface & Front Surface
The difference is the reflection. Back surface reflection is from the back of the glass and Front surface reflection is from the front of the glass.
Back Surface mouth mirrors have the reflecting Surface (obtained by evaporated Aluminum) on the back of the mirror glass. This part is protected on one side naturally by the glass, and on the other by a protection coating.
On the contrary to the Back Surface mouth mirrors the reflecting Surface of the Front Surface mirrors (through evaporation of Rhodium), is at it says, on the top of the mirror glass. This particular position offers the advantage of an incomparable sharpness and distinctness of the reflected image |