Your pulse duration must be equal to or ______ than the target's TRT to effectively destroy it.

For effective destruction of a target tissue with laser treatment, the pulse duration must be equal to or less than the target's thermal relaxation time (TRT). The thermal relaxation time is the time it takes for the target tissue to dissipate heat. If the pulse duration exceeds the TRT, the tissue may not cool sufficiently between pulses, which could lead to inadequate targeting and potential damage to surrounding tissues instead of the intended target.

By keeping the pulse duration equal to or shorter than the TRT, the treatment ensures that sufficient energy is delivered to achieve the desired effect while minimizing harm to adjacent areas. This principle is vital in laser applications, as it directly influences the efficiency and safety of the treatment.