Waves and ripples in water, air, and æther : Being a course of Christmas lectures delivered at the Royal Institution of Great Britain

A lively series of Christmas lectures invites listeners of any age to explore the world of waves through everyday sights and sounds. Beginning with the familiar roll of sea waves and the ripples a stone creates in a pond, the narrator shows how these visible motions echo the invisible undulations that carry our voices, music, and even the light we see.

The discussion then expands beyond water, drawing clear parallels between surface ripples, the pressure waves of air that deliver sound, and the mysterious “æther” waves that underlie modern marvels like wireless telegraphy. By linking concrete experiments with the hidden currents of light and electricity, the book offers an approachable gateway to the principles that shape both ordinary experience and cutting‑edge technology, all presented with a tone that feels like a curious chat with a knowledgeable friend.