phosphor
Covalent crystals are not necessarily opaque. Think of diamond, pure quartz crystals, pure aluminium oxide crystals these all are colorless and transparent.
Briefly, an LCD monitor uses thousands of tiny liquid crystals (the LC in LCD) as shutters that change from opaque to transparent depending on electricity applied to them. They let through white or colored light to form images, one tiny dot at a time. The dots are called pixels.
Thse crystals do not transmit light radiation.
crystals that ar opaque
Metallic crystals absorb light in the visible spectra, diamond crystal do not.
transparent to opaque between the crystals to the rock
Pure crystals are colorless.
An opaque mixture of pigments dissolved in linseed oil and applied to a panel is called a stain. Stains come in a variety of colors and are used to help protect wood from rotting.
Translucent since it is possible to monitor blood flow and pulse rate by placing a light source and photo detector either side of a finger. Opaque means totally barring the passage of light.
A coating of colored, opaque, or transparent material applied to ceramics before firing.
Translucent since it is possible to monitor blood flow and pulse rate by placing a light source and photo detector either side of a finger. Opaque means totally barring the passage of light.
You must have Mr. Williams.