Q2. 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.
Here are classified objects as opaque, transparent, translucent, luminous and non-luminous.
Opaque | Transparent | Translucent | Luminous | Non-luminous |
a piece of rock |
Air | smoke | a piece of red hot iron |
a piece of rock |
a sheet of aluminium |
Water | fog | a lighted fluorescent tube | smoke |
a mirror |
a sheet of plane glass | a sheet of cellophane | the flame of a gas burner |
Air |
a wooden board |
a wire mesh | a lighted torch |
a sheet of aluminium |
|
a piece of red hot iron |
a sheet of polythene | kerosene stove | water | |
an umbrella |
sun |
fog | ||
a wall |
firefly | a mirror | ||
a sheet of carbon paper |
a sheet of plane glass |
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a sheet of cardboard |
a sheet of cellophane |
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moon |
a wooden board |
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a CD |
a sheet of polythene |
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a wire mesh |
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an umbrella |
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a wall |
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a sheet of carbon paper |
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moon |