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.

Answers (1)

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

a sheet of cardboard

     

a sheet of cellophane

moon

     

a wooden board

a CD

     

a sheet of polythene

       

a wire mesh

       

an umbrella

       

a wall

       

a sheet of carbon paper

       

moon

 

 

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