Is the sparkling reflection specular or diffuse?

The answer to whether the sparkling waves are specular reflection or diffuse reflection is: diffuse reflection.

Because the sparkling lake surface can be seen at any angle on the lake surface, rather than at a single angle, it should be classified as diffuse reflection. Specular reflection means that the lake surface can only be seen in the direction of reflected light, that is It is said that if it is specular reflection, you cannot see the entire lake surface, but the reality is that we can see the entire lake surface in any direction, so it is diffuse reflection.

The similarities and differences between specular reflection and diffuse reflection:

The reflection of light by an object is divided into specular reflection and diffuse reflection. Regularly reflected light means that the incident angle on the surface of the object is equal to the reflection angle. Reflection occurs according to the law of reflection. Diffuse reflection is the reflection of light in an indefinite direction on the surface or interior of an object after it is projected onto a diffuse reflector.

Specular reflection and diffuse reflection, the reflection angle is equal to the incident angle. The only difference is that the reflection surface of specular reflection is relatively flat, so the light beam is relatively uniform and the reflection direction is relatively consistent. The reflection plane of diffuse reflection is high and low. The unevenness causes the reflected light beam to be messy as well. Both comply with the law of reflection.

Differences: The reflective surfaces are different: the reflective surface of specular reflection is smooth; the reflective surface of diffuse reflection is rough. The reflected light propagates in different directions: when a beam of parallel light is specularly reflected, the reflected light is still parallel light and propagates in a specific direction; if diffuse reflection occurs, the reflected light propagates around.

When a beam of light hits an uneven object, its reflected light also shoots in different directions, not parallel, so we can see the same object from different places, and this This reflection method is called "diffuse reflection". Otherwise, if it is all specular reflection, we can only see the object when we stand in a specific place.

The angle between the direction of the reflected wave and the normal to the reflection plane (reflection angle) is equal to the angle between the direction of the incident wave and the normal to the reflection plane (the angle of incidence), and the incident wave and the reflected wave , and the plane normal are in the same plane.

When taking photos, you should avoid specular reflection light entering the camera lens. Because the specular reflection light is extremely strong, it will form a white bright spot on the photo, which will affect the appearance of the ground objects themselves on the photo.