A student vigorously rubs a plastic comb through dry hair, which gives the comb a negative electrostatic charge. They then hold the charged comb just above some small, uncharged flakes of aluminium foil on a wooden table, as shown in the diagram.
Explain, in terms of the redistribution of charges, how the negatively-charged comb is able to attract and lift the uncharged flakes of aluminium foil.