Question

2. Classify the objects or materials given below as opaque, transparen
translucent and luminous or non-luminous:
Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board
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.
3. Can you think of creating a shape that would give a circular shadow if held in
one way and a rectangular shadow if held in another way?
In a completely dark room, if you hold up a mirror in front of you, will you see a
reflection of yourself in the mirror?​

Answer 1

Answer:

air :transprant

a peice of rock :opaque