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set up
ripple tank with water vibrating rod attached to powepack lamp above paper beneath
what does the rod and lamp do
the rod creates waves across the waters surface and the lamp helps reflect it onto paper
measuring wavelength
playback on phone measure 10 first lines and divide by 10 to get one wavelength
measuring frequency
measure amount of waves passing a point in ten seconds and then divide 10 to get one
use equation
v= fxwavelength
alternate method
time taken for one wave whole tank distance speed =distance/time