When a finger is placed on the screen, the sound
waves come into contact with it.
When
waves come into contact with one another, they exhibit interference: waves that are all in phase (rarefying or compressing the same particles at the same time) add together to become stronger, and waves that are out of phase with one another (for example, one wave attempts to rarefy particles in a medium while another attempts to compress those same particles) cancel out.
Not exact matches
She accomplished this by taking advantage of a simple fact —
waves travel differently when they
come into contact with different materials such as air, water or biological tissue.
They may explain an ancient observation by the Roman scientist Pliny the Elder, who opined that the concrete, «as soon as it
comes into contact with the
waves of the sea and is submerged, becomes a single stone mass, impregnable to the
waves and every day stronger.»
As a swell approaches the coastline and
comes into contact with the sea floor the
waves will start... Continue reading Understanding the
wave
However the tidal currents
coming into contact with the relief of the ocean bottom (even if this is very deep) creates
waves which are propagated at the interface between two layers of different densities.