Silver deposed on glass from a silver nitrate solution.
silver nitrate AgNO3 is used for silvering mirrors
No
Glucose.......by aun
The center of the spherical reflecting surface of the mirror is called the pole of the mirror.
it helps the mirror to hold
Silicone or latex caulking will it discolor the silver on mirror
silver nitrate AgNO3 is used for silvering mirrors
Mirror re-silvering typically costs between $20 to $50 per square foot, depending on the size and type of mirror. Additional charges may apply for removal and reinstallation. It is recommended to get quotes from multiple providers for accurate pricing.
It is because the silvering for the mirror is separating from the glass. Apparently this is a fairly common problem for heated mirrors. You need to replace the glass or whole housing.
There is a silvering in the vacuum flask in order to reduce the loss of heat through the means of radiation.
No
At the point of refraction. There are going to be more than one in a standard mirror. The surface of the mirror glass will reflect as well as the back of the glass. The "silvering" then reflects the majority of the light. Most high quality optics have the surface coated with a reflective substance.
No not really if they kept in a cool dry place. Reflectors need more attention, like the re-silvering of the mirror every few years (they don't actually use silver nowadays).
Glucose.......by aun
According to www.mirrorresilvering.com, they charge $20 a sq ft, or Length (inches) x Width (inches) x .1389 = Cost. Another website indicates they charge $15 per sq ft.
If only the silvering is gone, it can still be used, but it won't be as good. However, quite often the silvering is inside the vacuum compartment; if the silvering has vanished because the glass cracked, it is very probably unsafe to use. A thermal flask works by preventing heat conduction (the vacuum layer will not conduct heat) and by preventing heat radiation (the silver layer reflects the heat back at the contents). Without the silver layer, the heat will not be reflected. The flask will still work, but will lose or gain heat faster that it would if the silvering was intact. Note: The "silvering" on older flasks may be mercury. If the envelope is cracked and the mercury evaporates, it could prove toxic. Newer flasks use aluminum.
Silvering