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Exploring the cold knowledge of lighting
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Exploring the cold knowledge of lighting


Lighting is an integral part of our daily life, but do you know its cold knowledge? This article will take you to deeply explore the mysteries of light, from the wave-particle nature of light to the unique properties of light speed, let us uncover these amazing cold knowledge of light together.

Wave-particle nature of light: Light is both wave-like and particle-like. The concept was coined in the early 20th century by physicist de Broglie, who argued that light can be thought of both as a wave and as tiny particles made up of particles called photons. This wave-particle duality plays a crucial role in explaining the behavior and properties of light.

Color and frequency of light: We often talk about the color of light, but it actually refers to the frequency of light. The higher the frequency of light, the closer its color is to purple; the lower the frequency of light, the closer its color is to red. This is because the frequency of light is directly related to its energy, with higher frequency light having higher energy and lower frequency light having lower energy.

Speed of light: The speed of light is the fastest speed in the universe, about 300,000 kilometers per second. This means that light takes only about 8 minutes to travel from the Sun to the Earth, and 1.3 seconds to travel from the Earth to the Moon. The fast speed of light enables us to see things in the distance in an instant, and also facilitates our communication.

Refraction and reflection of light: Refraction and reflection occur when light propagates in different media. When light travels from one medium to another, its direction of propagation changes, which is the phenomenon of refraction. And when light hits a surface, part of the light will be reflected back, which is the phenomenon of reflection. These phenomena are reflected in the glasses in our daily life, the reflection on the water surface, etc.

Interference and diffraction of light: Interference of light refers to the interference phenomenon that occurs when two or more light waves meet. When two light waves meet, they either reinforce or cancel each other out, creating bright and dark interference fringes. Diffraction of light refers to the bending phenomenon that occurs when light passes through a small hole or around an obstacle. These phenomena play an important role in the wave properties of light.

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