What is diffraction?
Diffraction is one of the phenomena characterizingwave process. The study of this phenomenon is included in the course of school physics, as a rule, the presentation of material is accompanied by interesting demonstration experiments.
Let's take a closer look at what diffraction is.
Definition of term
Diffraction is a change in directionpropagation of a wave (light, sound, etc.) while passing through small narrow holes. Diffraction is also observed when small obstacles are bent around.
It is the phenomenon of diffraction that proves that light has wave properties. If you want to observe the phenomenon of diffraction of light, do the following:
- take a flashlight and a thick sheet of paper impermeable to light;
- make a small hole in the sheet;
- Extinguish light, sit against the wall, turn on the flashlight and direct its rays into the hole;
- look at the wall - you will see a complex picture of light and dark concentrated rings - this is the manifestation of diffraction.
The foundations of the theory of diffraction were laid by English and French physicists - Jung and Fresnel - in the 19th century.
Look for more interesting terms in the Definitions section.