'पारदर्शी' पदार्थ का उदाहरण है:

उत्तर: (B) काँच / Glass — Glass is transparent — light passes through completely, objects behind are clearly visible. Translucent (अर्धपारदर्शी): frosted glass, oiled paper. Opaque (अपारदर्शी): wood, metal, cardboard — no ligh...