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:

transparent/opaque

Explanation:

A piece of rock is opaque