Traditional Culture Encyclopedia - Photography and portraiture - Why is the reflection on the water surface a reflection? . What is the difference between refraction and reflection?
Why is the reflection on the water surface a reflection? . What is the difference between refraction and reflection?
Because specular reflection is when the incident light is parallel light, it is reflected to the smooth mirror surface, and then goes out as parallel light; diffuse reflection is when the incident light is parallel light, it is reflected to rough objects, and the reflected light is reflected to all directions. The direction goes out; the water surface is specular reflection, and we see that the height of objects in the water surface is different.
The difference between refraction and reflection is as follows:
1. Properties
Refraction: When light is incident obliquely from one transparent medium into another transparent medium, the propagation direction Changes generally occur.
Reflection: The phenomenon in which light changes its propagation direction at the interface between two substances and returns to the original substance.
2. Characteristics
Refraction: The refraction of light and the reflection of light occur at the junction of two media, except that the reflected light returns to the original medium, while the refracted light Entering another medium, since light propagates at different speeds in two different materials, the direction of propagation changes at the interface of the two media.
Reflection: In the reflection phenomenon, the reflected light, incident light and normal are all in the same plane; reflected light, incident light is separated on both sides of the normal; the reflection angle is equal to the incident angle.
Extended information:
Applications of refraction and reflection:
1. Lenses were invented using the principle of refraction. Lenses include convex lenses and concave lenses, and subdivided into biconvex lenses. There are six types: plano-convex, concave-convex, biconcave, plano-concave and convex-concave. The lens is the most basic optical element that makes up the microscope optical system. The objective lens, eyepiece and condenser are composed of single or multiple lenses. Such as magnifying glass, telescope, microscope, etc.
2. The optical fiber is divided into two layers. The inner layer and the outer layer have different densities, creating conditions for total reflection. In this way, when light is incident at a certain angle, total reflection can occur according to the principle of total reflection. , therefore, the energy consumed by light traveling in the optical fiber is very small. Therefore, the optical signal needs to use a repeater to enhance the intensity after passing a long distance in the optical fiber.
Baidu Encyclopedia-Refraction
Baidu Encyclopedia-Reflection
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