Light exhibits a fascinating phenomenon known as wave-particle duality, demonstrating characteristics of both waves and particles. This duality is encapsulated in the concept that light consists of tiny packets of energy called photons, behaving as discrete particles while also propagating as waves.

The concept of wavelength plays a crucial role in understanding light. Wavelength refers to the distance between successive peaks (or troughs) in a wave. In the realm of light, wavelengths are typically measured in nanometers (nm). The visible spectrum, ranging from red à violet, represents the segment of light with wavelengths detectable by the human eye.

The interaction of light with matter is heavily influenced by its wavelength. For instance, shorter wavelengths, like those in the ultraviolet spectrum, possess higher energy and can cause certain materials to fluoresce. On the other hand, longer wavelengths, such as infrared, are associated with heat.

Understanding the dual nature of light and the significance of wavelength opens a gateway to exploring the intricate ways in which light interacts with the world around us.