For effective hair removal, pulse time should be ______ for skin compared to the thermal relaxation time?

For effective hair removal, the pulse time should be longer than the thermal relaxation time of the skin. The thermal relaxation time is the duration it takes for the skin to cool down after being heated. By using a longer pulse duration, the energy delivered can effectively target the hair follicles while allowing enough time for the surrounding skin to remain protected from overheating. This minimizes the risk of damage to the skin and increases the efficiency of the hair removal process.

In contrast, if the pulse duration is shorter than the thermal relaxation time, it may not adequately provide enough heating to the hair follicles to effectively destroy them, potentially leading to less effective hair removal results. Therefore, choosing a pulse time that is longer than the thermal relaxation time is essential for optimal outcomes in laser hair removal treatments.