Phase is measured in which of the following units?

Phase refers to the position of a waveform in a cycle at a specific point in time, and it is typically expressed in degrees or radians. In many vibration analysis and signal processing contexts, degrees is the most common unit used to measure phase. A complete wave cycle corresponds to 360 degrees; thus, a phase shift can be described as a portion of this cycle. This makes degrees a natural choice for representing the phase of oscillating signals, as it allows clear communication of where the waveform is relative to its standard position.

While other choices like seconds and RPM are units that relate to time or frequency, they do not accurately capture the concept of phase directly. Similarly, orders can refer to multiples of a fundamental frequency in certain contexts, but they lack the specificity of phase measured in degrees. Therefore, measuring phase in degrees is the most practical and universally understood approach within vibration analysis.