Question

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 1

Answer:

Air-transparent, water-transparent, a piece of rock-opaque, a mirror-opaque

Answer 2

Answer:

air - transparent

water - transparent

a peice of rock - opaque

a sheet of aluminium - opaque

a mirror - opaque

a wooden board - opaque

a sheet of polythene - opaque

a CD - opaque

smoke - opaque or translucent

a sheet of plane glass - transparent

fog - translucent

an umbrella - opaque

a lighted bulb - opaque and luminious

a wall - opaque

sun - opaque and luminious

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