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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:
|
Object |
Opaque/Transparent/Translucent |
Luminous/Non-Luminous |
|
Air |
Transparent |
Non-Luminous |
|
Water |
Transparent |
Non-Luminous |
|
A piece of rock |
Opaque |
Non-Luminous |
|
A sheet of aluminium |
Opaque |
Non-Luminous |
|
A mirror |
Opaque |
Non-Luminous |
|
A wooden board |
Opaque |
Non-Luminous |
|
A sheet of polythene |
Translucent |
Non-Luminous |
|
A CD |
Opaque |
Non-Luminous |
|
Smoke |
Translucent |
Non-Luminous |
|
A sheet of plane glass |
Transparent |
Non-Luminous |
|
Fog |
Translucent |
Non-Luminous |
|
A piece of red hot iron |
Opaque |
Luminous |
|
An umbrella |
Opaque |
Non-Luminous |
|
A light fluorescent tube |
Opaque |
Luminous |
|
A wall |
Opaque |
Non-Luminous |
|
A sheet of carbon paper |
Opaque |
Non-Luminous |
|
The flame of a gas burner |
Translucent |
Luminous |
|
A sheet of cardboard |
Opaque |
Non-Luminous |
|
A lighted torch |
Opaque |
Luminous |
|
A sheet of cellophane |
Translucent |
Non-Luminous |
|
A wire mesh |
Translucent |
Non-Luminous |
|
Kerosene stove |
Opaque |
Luminous |
|
Sun |
Opaque |
Luminous |
|
Firefly |
Opaque |
Luminous |
|
Moon |
Opaque |
Non-Luminous |
