Question

Classify the objects or materials given below as opaque, transparent or translucent and luminous or 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, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, moon.

Answer 1

Answer:

Explanation:

opaque-a peice of rock, a aluminum sheet, a mirror,a wooden bord, cd,a peice of red hot iron,an umbrella,a wall,a sheet of carbon paper, a sheet of cardboard,a lighted torch,

translucent : air,water,a sheet of polythene,smoke,plane glass, wire mesh

luminous: cd, a red hot iron, a lighted fluoro tube, a lighted torch , flame

firefly,sun , moon

non luminous: the ones that dont produce light

Answer 2

Answer:

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