RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY
This image may not be used in educational posters.
Double-slit experiment. Illustration showing a plane wave (bottom) passing through a screen with two gaps. The gaps act as new wave sources and the wave fronts bend to create two sets of circular waves radiating outwards. These two new waves create an interference pattern as they interact. At the point where a wave peak from one hits a wave peak from another, or a trough hits a trough, they reinforce each other. This is known as constructive interference. Where a trough hits a peak or vice versa, they cancel each other out. This is known as destructive interference.
Model release not required. Property release not required.