Wave-particle duality of light: The concept that light exhibits both wave-like and particle-like properties, as debated by scientists such as Einstein (1905), who proposed that light can behave as discrete quanta (photons), and classical wave theories that describe light as an electromagnetic wave.
Wave nature of light: The idea that light propagates as an electromagnetic wave, characterized by properties such as wavelength, frequency, and wavefronts, supported by phenomena like diffraction and interference (see section 9.2).
Particle nature of light: The view that light consists of particles called photons, which explains phenomena like the photoelectric effect, as explained by Einstein (1905), emphasizing the corpuscular aspect of light.
Properties relevant to the nature of light:
1. What does the wave-particle duality of light refer to?
2. What does Huygen’s principle state about a wave-front?
3. What is the primary role of Huygen’s principle in wave optics?
Wave-particle duality of light
Light exhibits both wave and particle properties.
Wave nature of light
Light propagates as an electromagnetic wave.
Particle nature of light
Light consists of photons, discrete energy quanta.
Wave-front — definition?
Surface of constant phase in a wave.
Wave-front propagation
Movement of wave-fronts indicating wave travel direction.
Huygen’s principle — role?
Wave-fronts are formed by secondary wavelets from each point.
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