1 Place the bulgur in a bowl, and cover with water by 1/2 inch. 2  Soak for 20 minutes, until slightly softened. 3  Drain through a cheesecloth-lined strainer, and press the bulgur against the strainer to squeeze out excess water.
Amplitude. Amplitude is a measurement of the vertical distance of the wave from the average. The wave axis is the average height of the wave over one cycle, and is usually considered to be zero. Heights above and below the average are given positive and negative values, respectively. The wave shape shown below is called a sine wave. The maximum and minimum amplitudes of this sine wave are the heights measured from the wave axis (white line) to the top of the wave peak and bottom of the wave trough.
The amplitude of a light wave can be measured, but if you start thinking about photons instead of waves you will start getting into a little trouble. The amplitude of light, in a classical sense, is a measurement of its intensity (brightness). Getting into photons means getting into Quantum Mechanics (QM), and we lose the idea of wave amplitude for particles of light. There is a concept of probability amplitude in QM, but that is not a physical wave amplitude.