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 flamc of a gas burner,
a shcct of cardboard, a lighted torch,
a shcct of cellophane, a wire mesh,
kerosene stove,
sun,
firefly,
moon.

Answer 1

transparent
transparent
opaque
opaque