Diffraction意思

Diffraction is a phenomenon that occurs when a wave encounters an obstacle or a slit narrower than its wavelength. It results in the bending of the wave around the obstacle or the spreading of the wave through the slit, causing the wave to diffract. This phenomenon is a result of the interference of the wave with itself as it passes through or around the obstacle.

Diffraction is important in many areas of physics, including optics, acoustics, and electromagnetics. In optics, it is used to explain the spreading of light waves around objects, which is why objects appear blurry when they are viewed through a narrow aperture. In acoustics, it is used to explain the spreading of sound waves around obstacles, which is why sound waves can be heard around corners. In electromagnetics, it is used to explain the behavior of electromagnetic waves as they pass through or around obstacles.