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.
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.
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).
By 'Atomic Scattering from the silvering, after being refracted through the glass. (refraction is caused by slowing due to PMD - the slight time delay of polarisation, which is different subject to frequency). EM energy polarises particles and they re-emitt the energy, at the reciprocal angle as long as the mirror is not moving. (if it is it proves school science wrong by doing the reciprocal with respect to the air or vacuum NOT the mirror).
£2.50
You can re-sleeve most of them.
It costs almost as much as a replacement tub.
Not properly. There are two ways to make a mirror: Domestic mirrors are silvered (with metallic silver) on the back surface (because people touch the front) of the glass then this silver layer is coated with protective paint and plastic. A domestic mirror lasts a long time. Astronomical mirrors are silvered (with metallic aluminum) on the front surface of the glass (so the light does not have to pass through the glass to be reflected) by evaporating the aluminum metal onto the glass. An astronomical mirror needs frequent re-silvering.
100-200 USD or so
You can get a re-manufactured cummins for around $8000.00.
$99 at profix
pull on the mirror assy. and disconnect the 2 mirror heat wires , to re-install push hard on the center of the mirror to engage the cross swivel , and the 2 treaded . pull on the mirror assy. and disconnect the 2 mirror heat wires , to re-install push hard on the center of the mirror to engage the cross swivel , and the 2 treaded .
RE GLUE ITANS 2 - Get 'Loctite Auto Mirror Adhesive' from any good auto parts store.