If waves in an ocean travel with a phase velocity , vp = Aλ-1/2 then the group velocity vg of the wave packet’ of these waves is
(a) vg = (3/2)vp
(b) vg = (5/2) vp
(c) vg = (2/3)vp
(d) vg = (2/5)vp
Correct option (a) vg = (3/2)vp
Explanation: