This book aims to popularize physics by emphasizing conceptual ideas of
physics and their interconnections while avoiding mathematics entirely. The
approach is to explore intriguing topics by asking and discussing questions,
thereby the reader can participate in developing answers, which enables a
deeper understanding than is achievable with memorization. The topic of this
volume, 'Colors, light, and Optical Illusions', is chosen because we face colors
and light every waking minute of our lives. We experience optical illusions
much more often than we realize. This book will attract all those with a curious
mind about nature and with a desire to understand how nature works, especially
the younger generation of secondary school children and their teachers.