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Answer :
(1) Opaque :
A piece of rock, a sheet of aluminum, a mirror, a wooden board, a CD, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a wire mesh, kerosene stove, sun, firefly, the moon, lighted torch.
(2) Transparent :
Air, water, a sheet of plane glass.
(3) Translucent :
A sheet of polythene, smoke, fog, flame of gas burner ,a sheet of cellophane, a wire mesh.
(4) Luminous :
A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly, kerosene stove.
(5) Non-luminous :
Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, moon.