Pinku and Rinku are TIME IIT-F students. They went to a jewellery shop with their mother. They were delightedto see the lustrous gold ornaments. Pinku peeped through the showcase to see a diamond necklace and total Rinku- Really, the glitterance of diamonds is incomparable to the lustre of gold ! Rinku complained that their chemisty teacher explained the lustre of metals in detail but didn't mention about diamonds at all. They both decided to ask their chemistry teacher the next day. What Explanation will the teacher give ?

Pinku and Rinku are TIME IIT-F students. They went to a jewellery shop

1.	Pinku and Rinku are TIME IIT-F students. They went to a jewellery shop with their mother. They were delightedto see the lustrous gold ornaments. Pinku peeped through the showcase to see a diamond necklace and total Rinku- Really, the glitterance of diamonds is incomparable to the lustre of gold ! Rinku complained that their chemisty teacher explained the lustre of metals in detail but didn't mention about diamonds at all. They both decided to ask their chemistry teacher the next day. What Explanation will the teacher give ?
Answer» Solution :Metals possess free electrons and on adsorption of light, these electrons undergo excitation and deexcitation. This gives metal their lustre. Diamond does not possess any free electrons. However, when light falls on it,the edges of diamond REFLECT light at a certain angle and this pehnomenon is called total INTERNAL reflection. This lead to the SPARKLING of diamond which is RESPONSIBLE for its unique position among all gemstones.