Depending on the exact path length, these reflections can interfere destructively or constructively. The volume varies like in a tremolo as the sounds alternately interfere constructively and destructively. Depending on the magnitude of the phase shift, the waves can interfere constructively and destructively. Depending on the thickness of the film, different colours interfere constructively and destructively. Lubit compared healthily narcissistic managers versus destructively narcissistic managers for their long-term impact on organizations. The probability amplitudes for the different paths interfere destructively. This happens because different wavelengths of the different frequencies interfere destructively at different points. In fact it was sometimes destructively rancorous. They are mostly used aggressively and destructively and defensively, actually. When it is zero, they are out of phase and interfere destructively. Both can be done destructively, which is more common, or non destructively. Plant tissue tests destructively sample the plant of interest.