Question

Id A piece of glass is transparent but a piece of cardboard is​

Answer 1

Answer:

A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard. Transparent: Air, water, a sheet of plane glass. Translucent: A sheet of polythene, smoke, fog, a sheet of cellophane, a wire mesh.

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Answer 2

a piece of cardboard is opaque.