"She love the ocean because every time the waves left the shore, they always come back."
In nature, the energy and momentum is transfer from one point to another point by wave. This is one of the most phenomena in nature. They are all around us, Such as Radio wave, Mobile wave, Micro wave, Water wave, Visible light, Earthquake, Slinky waves etc......
First of all, we have to visualize what wave is? If we drop a stone into still water in the pond, a disturbance is produced at that point and circular waves will be formed, which moved outward and finally reach the shore(land at edge of water) of the pond. Another example is, the sound waves, which carry energy from the source to observer by disturbance of air.
A wave is a continuous transfer of disturbance from one part of a medium to another through successive vibration of a particles of the medium about their mean positions.
In a wave motion, energy and momentum are carried from one region to another region of a medium. If there is no transfer energy, it is not a wave but an oscillation as there is no transfer of energy[1].
Fig 3: Wave Motion
There are two ways of energy transfer by waves:
i) Mechanical waves: The wave which require material medium for their transmission. Ripples of a water, Sound waves, Vibration in a stretched string etc.
ii) Non Mechanical Waves: The wave which do not require material medium for their transmission. Electromagnetic waves (X-Rays, light waves, micro waves, radio waves) are the best example of non mechanical waves, which can be transmitted through vacuum.
Wave Motion
Note: In Nature, there is another wave is called Matter waves. They are produce in Electrons and Particles.
