Interference is the phenomenon in which two waves superpose to form the resultant wave of the lower, higher or same amplitude. The most commonly seen interference is the optical interference or light interference. ... This means that light waves coming out of a source do not have a constant amplitude, frequency or phase.

What is interference of light give example?

One of the best examples of interference is demonstrated by the light reflected from a film of oil floating on water. ... Another example is the thin film of a soap bubble, which reflects a spectrum of beautiful colors when illuminated by natural or artificial light sources.

What causes interference of light?

If the vibrations produced by the electric field vectors (which are perpendicular to the propagation direction) from each wave are parallel to each other (in effect, the vectors vibrate in the same plane), then the light waves may combine and undergo interference.