The Law Of Light Monitoring, Understanding Concepts And Types

YOGYAKARTA - Have you ever wondered why your face shadow is clearly visible when you reflect? Or why can flashlights focus light on one particular direction? All of these phenomena are closely related to the light screening law.

The law of light monitoring is one of the fundamental concepts in physics that accounts for the properties of light when it comes to certain surfaces. The understanding of this concept not only helps us understand optical phenomena, but also paves the way for innovation in the field of illumination and optic technology.

Light monitoring is the return of light after hitting the surface of an object. When light hits a smooth and shiny surface, like a mirror, most of the light will be reflected back.

The incoming beam is called a beam coming, while the reflected light is called a reflection beam. As for the point where the light falls, if it is described as a line perpendicular to the surface, this line is called a normal line.

In physical science, light monitoring follows two main principles known as the law of monitoring. The following is the sound of the law of monitoring:

In other words, if a light beam hits a smooth mirror-like surface, then the angle between the beam coming with the normal line (angle coming) will be the same as the angle between the reflection beam and the normal line (vertex angle). This is why the shadow of the face in the mirror looks symmetric and opposite direction.

Light monitoring does not always produce a clear shadow. Based on the surface of the reflection, the monitoring is distinguished into two main types:

Regular monitoring occurs when light hits a smooth and flat surface, like a flat mirror. Under these conditions, all the rays coming parallel will be reflected back aligned as well. As a result, the resulting shadow appears clear and regular. The mirror is flat, for example, producing a shadow that is virtual, perpendicular, and has the same size as the original object.

2. Unordered Monitoring (Difus)

If the surface exposed to light is uneven, like a wood or a rock, then the reflection beam will spread in various directions. Although the angle coming remains the same as the reflection angle at microscopic points, the reflection direction becomes nonuniform as a whole. This monitoring allows us to see the surface of the object from various angles, although it does not produce a clear shadow.

In addition to a flat mirror, there are two other types of mirrors that take advantage of the laws of bullying for special purposes, namely concave mirrors and convex mirrors.

A concave mirror is a mirror with a curvature surface inward (like the inside of the bowl). This mirror focuses light on one point (focus point). The resulting image depends on the position of the object to the focal point:

In everyday life, concave mirrors are used on vehicle lights and flashlights to help straight light and spread far.

2. Convex Mirror

Unlike the concave mirror, the convex mirror has a curvature surface to the outside. This mirror spreads light and always produces virtual, upright, and minimized shadows, no matter where the position of the object is.

Convex mirrors include being used as vehicle rearview mirrors, security equipment in stores, or road mirrors at sharp bends to prevent accidents.