How can you distinguish the appearance of different materials? explain with examples.
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Materials which are lustrous (shiny) can be classified as metals and which are not, as nonmetals
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Lustre & Smoothness are the two characteristics that allow you to distinguish the appearance of different materials. The surface of some materials are shiny while others are rather dull. This Shine of materials is called lustre. For example A page from your notebook has no lustre & appears dull when compared to a kettle made of metal. Move your hand over the surface of a clean window pane. You notice that the surface of the window pane is very smooth.
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