Question

define wavelets and wavefront

Answer 1

Wavefront -

A wave front is defined as a surface of constant phase of waves. For example, if a stone is dropped in a calm pool of water, waves spread out in circular rings from the point of impact. All points on such a circle are oscillating in phase. Such a circle is known as a wave front.


Wavelets -

A wavelet is a wave-like oscillation with an amplitude that starts out at zero, increases, and then decreases back to zero. It can typically be visualized as a "brief oscillation" like one might see recorded by a seismograph or heart monitor. 

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Answer 2

wave let is a imaginary surface representing corresponding points of a wave that vivrate in a same phase

wavefront could be the surface over which the wave has maximum or minimum value