Which method is used to check alignment according to the principles of laser technology?

The use of laser technology for checking alignment is primarily based on its ability to produce precise and accurate readings. When utilizing a laser detector, it emits a focused beam that can be aimed at a specific target, allowing for precise measurements of alignment and distances. The readings obtained from the laser detector provide real-time data that can help assess whether an object is aligned properly based on the laser's projected line. This method stands out because it minimizes human error, increases accuracy, and can cover longer distances compared to manual methods.

In contrast, visual inspection relies heavily on the interpretative skills of the observer, which can lead to subjective assessments. Using a measuring tape is limited by the potential for miscalibration or misreading the measurement due to physical constraints. Cavity measurement also typically involves more complex techniques that may not specifically address alignment in the same straightforward manner as laser technology. Thus, reading output from the laser detector is the most reliable and effective method for checking alignment when applying the principles of laser technology.