Q.Define progressive wave. State any four properties.

[!TLDR] A progressive wave is a disturbance that keeps travelling outward from its source until stopped externally; its four key properties are uniform amplitude/period/frequency across particles, phase varying particle-to-particle, energy transfer, and a medium requirement for mechanical waves. [!ANSWER] Progressive wave = a travelling disturbance carrying energy outwa …

A progressive (or travelling) wave is one in which a disturbance created at one place keeps travelling onward to distant points of the medium, continuing to do so unless stopped by some external agency (a wall, boundary or obstacle) -- as opposed to a stationary wave, where the disturbance does not travel onward in this way. Four properties characterise a progressive wave: (1) ALL vibrating particles of the medium share the SAME amplitude, period and frequency as each other, regardless of their position along the wave; (2) the STATE OF OSCILLATION (phase) genuinely changes from particle to particle along the wave's path, even though A, T and n are shared; (3) the wave transfers ENERGY and momentum continuously from one point to another, without any net transfer of the medium's own material; (4) for a MECHANICAL progressive wave specifically, a material medium is essential -- the medium must be continuous/elastic, possess inertia, and have low frictional losses, for th …

State the definition of a progressive wave (from section 8.1) and list any four of its characteris …

Listing properties specific to only ONE wave type (e.g. crests/troughs, which are transverse-only) instead of the four GENERAL properties that app …