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(B) The metallic lustre exhibited by sodium is explained by the oscillation of loose electrons.When light falls on the surface of sodium,the free elec

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Oscillation of loose electrons

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(B) The metallic lustre exhibited by sodium is explained by the oscillation of loose electrons.When light falls on the surface of sodium,the free electrons present in the metallic lattice start oscillating at their mean positions due to the interaction with the incident light.These electrons get excited to higher energy levels and,upon returning to their lower energy levels,they emit light in all directions.This phenomenon of light reflection and emission gives sodium its characteristic metallic lustre.

The metallic lustre exhibited by sodium is explained by

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