6th Class Science Lights and Sound

  • question_answer 15) 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:

    Classification of objects or materials is given below:  

    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 Translucent Non-luminous
    CD Translucent Non-luminous
    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
    Firefly Opaque Luminous
    Moon Opaque Non-luminous
     

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