Observing internal gravity waves |
|
|
|
||||||
|
The mean current flows from right to left just below the membrane. |
The period of reversing currents is approx. 75 min. |
When a current occurs, the waves heading to the right
and those heading to the left become stronger alternately. |
Experimental conditions
Brunt-Väisälä period : 3.9 sec
The amplitude of the membrane was measured at the center of the membrane.Photographic conditions
f=135mm,F32,ASA400,red and blue strobes are used.