Transparent substances ... Frosted glass is translucent. It allows some light to pass through, but images of objects viewed through the frosted glass are not clear. Opaque close opaqueA material ...

Properties and uses of pigments and dyes are discussed; the concept of luminance is introduced; and we see what makes an object transparent, translucent or opaque.

The resulting "aerobricks" proved to have very high thermal insulation properties … but of course, they were opaque. Now, the scientists have taken translucent silica aerogel granules and used ...