The lustre of a metal is due to

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(D) The metallic lustre is primarily due to the presence of $free \ electrons$ in the metal lattice. When light falls on the surface of the metal,thes

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Presence of free electrons

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(D) The metallic lustre is primarily due to the presence of $free \ electrons$ in the metal lattice. When light falls on the surface of the metal,these $free \ electrons$ absorb the energy and get excited. Upon returning to their ground state,they re-emit the absorbed energy as light,which gives the metal its characteristic shiny appearance.

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