Internal Gravity Wave

Observing waves formed by an oscillating rod

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Water tank
Material: Acrylic board
Height: 59cm
Width: 58cm
Depth: 10cm
 
Working fluid
Stratifield salt water.
 
Visualization
Moiré technique.
The vertical striped patterns with 1mm and 1.1mm intervals were used. The two patterns were placed 30cm apart.3)
 
Experimental process
A 4cm diameter rod was hung by fishing line in the stratified fluid, and oscillated up and down. The waves thereby created were viewed from the side.