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 aluminum, 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.
Classification of objects is given below:
Object | Transparent/Translucent /Opaque | Luminous/ Non-luminous |
Air | Transparent | Non-luminous |
Water | Transparent | Non-luminous |
A Piece of rock | Opaque | Non-luminous |
A sheet of aluminum | Opaque | Non-luminous |
Mirror | Opaque | Non-luminous |
A wooden board | Opaque | Non-luminous |
A sheet of polythene | Translucent | Non-luminous |
CD | Opaque | |
Smoke | Translucent | Non-luminous |
Sheet of plane glass | Transparent | Non-luminous |
Fog | Translucent | Non-luminous |
Piece of red hot iron | Opaque | Luminous |
Umbrella | Opaque | Non-luminous |
Lighted fluorescent tube | Opaque | Luminous |
Wall | Opaque | Non-luminous |
Sheet of carbon paper | Opaque | Non-luminous |
Flame of a gas burner | Translucent | Luminous |
Sheet of cardboard | Opaque | Non-luminous |
Lighted torch | Opaque | Luminous |
Sheet of cellophane | Transparent | Non-luminous |
Wire mesh | Translucent | Non-luminous |
Kerosene stove | Opaque | Luminous |
Sun | Opaque | Luminous |
Moon | Opaque | Non-luminous |
Fire fly | Opaque | Luminous |