What type of interference occurs when waves combine in phase to create a larger amplitude?

When waves interact in phase, meaning their peaks and troughs align, they combine to produce a wave with a larger amplitude. This phenomenon is known as constructive interference. In the context of wave behavior, when two or more waves meet and their amplitudes add together, the overall effect is an increase in the resultant amplitude of the wave.

This type of interference is particularly important in various applications, including acoustics, optics, and radio waves, where maximizing signal strength or sound intensity is often desired. Understanding constructive interference can help explain various phenomena, such as the bright spots seen in patterns of light when coherent light sources overlap.

The other options, while relevant to wave interactions, do not describe this particular process of amplitude enhancement through in-phase combination of waves.