Classify the following as opaque, transparent or translucent, and luminous or non-luminous.

Air, Water, Red hot iron, Umbrella, Firefly, Moon.

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Solution

Air:
Transparent and non-luminous

Water:
Transparent and non-luminous

Red hot iron:
Opaque and luminous

Umbrella:
Opaque and non-luminous

Firefly:
Opaque and luminous

Moon:
Opaque and non-luminous

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Classify the objects or materials given below as opaque, transparent or translucent, luminous or non-luminous:

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Air,water, piece of rock, sheet of aluminium, mirror, wooden board, sheetof polythene, CD, smoke, sheet of plane glass, fog, piece of red hotiron, umbrella, lighted florescent tube, wall, sheet of carbon paper,flame of a gas burner, sheet of cardboard, lighted torch, sheet ofcellophane, wire mesh, kerosene stove, sun, firefly, moon.

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Classify the following as opaque, transparent or translucent, and luminous or non-luminous. Air, Water, Red hot iron, Umbrella, Firefly, Moon.

Air: Transparent and non-luminous Water: Transparent and non-luminous Red hot iron: Opaque and luminous Umbrella: Opaque and non-luminous Firefly: Opaque and luminous Moon: Opaque and non-luminous

Classify the following as opaque, transparent or translucent, and luminous or non-luminous.

Air, Water, Red hot iron, Umbrella, Firefly, Moon.

Air:
Transparent and non-luminous

Water:
Transparent and non-luminous

Red hot iron:
Opaque and luminous

Umbrella:
Opaque and non-luminous

Firefly:
Opaque and luminous

Moon:
Opaque and non-luminous