Question

explain the statement relative density of aluminium is2.7​

Answer 1

relative index is the rati of light speed in vacuum and speed of light in medium

so,relative index of aluminium is 2.7 means it's

ratio of speed of light in vacuum to speed in aluminium medium of light is 2.7.

hope so helpful

Answer 2

a piece of aluminium of a given volume has a mass 2.7 times that of an equal volume of water