Lustrous and Non - Lustrous Materials

Transcript

Which of the following objects are Shiny ?This is not Shiny This is Non - Lustrous Material This is Shiny This is Lustrous Material Do Lustrous Materials always remain Shiny ?This metal have lose its Shine (lustre) due to the effect of air and moisture on it Difference Between Lustrous and Non - Lustrous MaterialsLustrous Material Non - Lustrous Material Lustrous materials are those materials that typically have shiny surfaces Non - lustrous materials are those materials that do not have a shiny surface Such materials are usually metals Such materials are usually non - metals Example - iron, copper, zinc, aluminium, gold, etc Example - jute, wood, rubber, paper, Plastic, etc Metals are normally Lustrous MaterialsThis is made from Brass metal These are made from Steel Metal But not all Lustrous Materials are MetalsBoth of them are shiny But they are not metals Plastic Bag Why it is said "All that Glitters is not Gold"Gold Jewellery Gold Glitters (Shines Or has lustre) Artificial Jewellery Artificial Jewellery Also Glitters even though it is not Gold Diamond Jewellery Diamond is a stone which also Glitters Even though it is not a metal like Gold