Deechristophermagic
How can you tell if a image is a real or concave mirror?
In a concave mirror, the image is real if the distance of the object from the mirror is greater than the focal length and virtual if it is less than the focal length. If the object is at the focus the image is formed at infinity. In a convex mirror, the image is always virtual.
Keeping this in consideration, do modern mirrors contain mercury?
Historically mercury was used to create the reflective surface of mirrors but, misleadingly, mercury glass does not actually contain mercury. People also ask how can you tell if a mirror has mercury in it? Tip: Place a rod (pen or toothpick) on the mirror. If the point touching the mirror looks like it is directly "touching" its reflection, the glass layer is thin enough and the mirror is probably modern. On the other hand, if the point is separate from its reflection, then it is probably mercury (prior to 1835).
Why do mirrors go black?
What is Mirror Desilvering? When mirrors are exposed to excess moisture, water can get between the layer of silver and the backing. This causes the bond to break and the silvering to chip off behind the glass. This leaves your mirror with unsightly dark spots or black edges where the silver has fallen away. Why do we sometimes look different in a plane mirror? A reflection appears to be the same distance from the "other side" of the mirror as the viewer's eyes are from the mirror. However, if the surface of the mirror is curved, the angles of reflection are different at different points on the surface.
Do mirrors have lead?
Ordinary mirrors manufactured using copper or lead are non-environment-friendly products and tend to produce distorted images. Copper-free or Lead-free mirrors are the most-modern mirrors that are manufactured without using copper or lead. Thereof, do old mirrors have value? The truth is, not all antique looking mirrors actually have age value as you might suppose. Yes, that is right, just because it looks old, doesn't make it valuable.
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