Reflection from rough surfaces, such as asphalt, paper and clothing are examples of diffuse reflection. In diffuse reflection, light rays are scattered randomly at different angles from the reflecting surface.Continue Reading
Ideal diffuse reflection results in equal luminance in all directions at the half-plane adjacent to the surface. This ideal form of diffuse reflection is called Lambertian reflectance. Such ideal reflecting surfaces are hypothetical, and actual reflecting surfaces are anisotropic, reflecting more in certain directions than in others. Surfaces with a high degree of diffusive efficiency include plaster, paper, white marble and talcum powder.
Specular reflection is exhibited by a mirror or a calm water surface, where coherent incident light rays are coherently reflected according to the law of reflection. The incidence angle and the reflected angle are equal in perfectly specular reflection. All reflection obeys the law of reflection, but diffuse reflection results in scattering because the reflection angles from each part of the material are different due to the random orientation of the surface.
Even slight surface imperfections make perfect specular reflection impossible, so any reflection from a real surface will always be some combination of diffuse and specular. Diffuse reflection is used form ambient lighting applications, such as frosted glass bulbs, while specular reflection is used for optical applications, such as microscopes and telescopes.Learn more about Optics & Waves
Echoes work through the reflection of sound waves. When a person shouts into a well or canyon, and they hear an echo, it is because the sound waves reflect from the canyon wall or the bottom of the well and travel back to the person's ears.Full Answer >
The law of reflection states that when light falls upon a plane surface and is reflected, the angle of incidence is equal to the angle of reflection. This law is used when the incidence ray, the reflected ray and the normal all fall upon a plane area of incidence.Full Answer >
The difference between reflection and refraction is that in reflection waves bounce off of a surface while in refraction those waves do not bounce back but pass through the surface, which bends them and changes the speed of the waves. The image of a face is reflected back from a pool of water, but the light on the bottom of the pool of water is refracted because it is uneven and hazy due to the way the water bends the light waves.Full Answer >
Light interacts with matter through absorption, transmission and reflection. When light strikes the leaf of a plant, the leaf absorbs the light energy, and through the process of photosynthesis, transforms the energy into the food glucose. The leaf reflects the green wavelengths of visible light, giving it the green color.Full Answer >