Internal Gravity Wave

Observing waves formed on the
leeward side of mountains

/


4 sec after start


10 sec after start


16 sec after start

left to right

right to left
The frequency of the waves near the surface is close the Brunt-Brunt-Väisälä frequency,
and the wave face is almost vertical.

Experimental conditions

Brunt-Väisälä frequency: 3.9 sec.
Velocity of the rod: 1.6cm/s

Photographic conditions

f=135mm, F4.5, 1/15 sec, ASA400, 2mm slit used.

Filming conditions

5mm slit used.
Speeded up 5 times
240x180:15fps, 320x240:30fps