🔥👉The laws of illumination are fundamental principles that govern the relationship between light, objects, and the human eye. These laws describe how the amount and distribution of light affect the perception of brightness and color, and are essential for designing lighting systems for various applications, including indoor and outdoor environments, transportation, and visual communication. In this article, we will discuss the three main laws of illumination: the inverse square law, Lambert's cosine law, and the law of reflection.
👉 Inverse Square Law:
The inverse square law states that the intensity of light from a point source decreases inversely with the square of the distance from the source. In other words, if the distance between the source and the object is doubled, the intensity of light on the object will be reduced to one-fourth of the original value. This law is based on the assumption that light spreads out uniformly in all directions from a point source.
This law is important for designing lighting systems that provide uniform illumination over a given area, such as in indoor spaces. The inverse square law is used to determine the spacing and placement of light fixtures to achieve the desired level of illumination.
👉Lambert's Cosine Law:
Lambert's cosine law states that the amount of light reflected from a surface is proportional to the cosine of the angle between the surface normal and the direction of the incident light. In other words, the amount of light reflected from a surface is maximum when the incident light is perpendicular to the surface, and decreases as the angle of incidence increases.
This law is important for designing lighting systems that provide optimal visual comfort and reduce glare. The law is used to determine the placement and direction of light fixtures to minimize the angle of incidence on surfaces and reduce the amount of reflected light that can cause discomfort or glare.
👉 Law of Reflection:
The law of reflection states that the angle of incidence of a light ray is equal to the angle of reflection from a smooth surface. This law applies to smooth, reflective surfaces such as mirrors and polished metals.
This law is important for designing lighting systems that provide optimal visibility and clarity in reflective surfaces, such as in transportation applications. The law of reflection is used to determine the placement and direction of light fixtures to ensure that the light rays are reflected in the desired direction and do not cause reflections that can obscure or distort visual information.