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What is a wave diagram?

(a) Plot of wave motion between t and x

(b) Plot of reflected wave motion between t and x

(c) Diagram of shock creation inside shock tube

(d) Plot of wave motion between x and t

The question was asked in an online quiz.

This intriguing question originated from Reflected Shock Wave topic in portion Unsteady Wave Motion of Aerodynamics

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Right answer is (a) Plot of wave motion between t and x

The explanation: When unsteady wave motion i.e. moving shock wave is studied, wave diagram is often constructed. It is a sketch of the wave diagram plot on a graph with x – axis representing distance and y – axis representing the time. The diagram shows where the incident, reflected shock occurs after applying the boundary conditions.

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