Lots of edges reflecting, refracting light in random patterns;
thus you can't see through it.
Translucent.
Toughened glass is transparent. It is translucent if frosted. To be opaque, it would need to be covered with something that won't let light through.
No, that is what opaque means. Light does not go through an opaque object. An object that is translucent will allow light through, but is opaque enough to keep you from seeing clearly through it (think about frosted glass used for bathroom windows). Transparent is "see through".
translucent because it means that you can kind of see through it
a mirror is translucent even though it looks transparent.
Yes. Go to any church to see partially opaque glass, and many vases are constructed of opaque glass.
yes
Then, your diamond looks opaque white under a black light.
He painted a thick glass wall. The color was opaque red.
Aperture Science
yes
The only problem that I see, if it was meant to be opaque, is that you can't see through it, which defeats the purpose of a window. If you are trying to make/buy clear glass, impurities within the glass would not allow light to pass through as easily and I imagine that this might make the glass weaker and less useful.
Translucent.
Toughened glass is transparent. It is translucent if frosted. To be opaque, it would need to be covered with something that won't let light through.
If the sun can get through but no one can see in then the room is glass opaque. An opaque room will prevent others from seeing in.
Metals are opaque, because they have metallic bonding which means that all of the atoms are surrounded by free moving electrons. Therefore, any light that passes through a metal will hit one of these electrons which will absorb the light and re-emit it. The light that is re-emitted is known as reflection which is why metals are lustrous.
No, such a transparent metal is not possible. Metals are a conductor of electricity. As a result of this, electromagnetic waves of the wavelength of light cannot penetrate it.