you have mistaken here it must be minimum at trough and maximum at crests.HUMERA.S said:waves have min. energy at crest and max. at crest. i don't ...
Crest and trough interference is a phenomenon that occurs when two or more light waves meet and overlap in the same space. This results in a change in the intensity and direction of the light waves.
When two light waves meet, their crests and troughs can either align or cancel each other out. When they align, the waves combine and create a stronger wave with a higher intensity. When they cancel each other out, they create a darker or dimmer area.
Crest and trough interference is caused by the superposition of two or more light waves. This means that the waves are overlapping and interacting with each other, resulting in changes to the overall intensity and direction of the light.
Crest and trough interference can result in the creation of bright and dark areas, as well as changes in the overall color of the light. It can also cause diffraction, where the light waves spread out and create a pattern.
Crest and trough interference can be seen in various everyday situations, such as when light reflects off of a soap bubble, creating colorful patterns, or when light passes through a thin film of oil on water, resulting in a rainbow effect. It is also used in technologies like anti-reflective coatings on glasses and interference filters on camera lenses.