why is there glass in mirror ?
Answers
Answer:
glass reflects the image it doesn't allow to pass
it's opaque
that's why u can see yourself on a mirror
Answer:
Explanation:
Any polished metal can be a mirror. Glass is merely used as a substrate to hold and protect a thin metallic layer. A silver coated piece of glass makes a great mirror with a layer of silver only a few atoms think. This is cheap but silver tarnishes easily in air so the back side of the mirror is painted to protect the silver while the front side protected by glass is highly reflective.
The presence of the glass however can cause a ghost image since the glass itself is somewhat reflective. To eliminate this effect in high quality optics the silver coating is protected with a thin layer of a hard transparent material like MgF2. This way the front surface reflects with no ghosting and the glass only serves as a holder and could be replaced by any other material.