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Light Shadows And Reflection

Question 2:

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

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

Answer:

Object

Object is Transparent/Translucent/Opaque

Object is Luminous/Non-luminous

Air

Transparent

Non-luminous

Water

Transparent

Non-luminous

Piece of rock

Opaque

Non-luminous

Sheet of aluminium

Opaque

Non-luminous

Mirror

Opaque

Non-luminous

Wooden board

Opaque

Non-luminous

Sheet of polythene…

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