Which statement is true regarding the energy delivery of lasers?

Lasers are distinct for their ability to deliver energy in a monochromatic manner, which means the light emitted is of a single wavelength or color. This characteristic arises from the stimulated emission process that generates laser light, where photons emitted have the same energy, frequency, and direction. This monochromatic property is essential for applications that require precision and focus, like in medical treatments and industrial cutting, where specific wavelengths can target certain materials or biological tissues effectively.

Other statements may address different aspects of laser behavior, such as delivery in pulsed or constant manners, but these do not capture the fundamental defining feature of what a laser is and how it uniquely produces and delivers energy based on wavelength. The diffused manner is particularly incorrect, as lasers typically concentrate energy in a specific beam rather than spreading it out. Hence, the focus on monochromatic energy delivery is the defining characteristic that distinguishes lasers from other light sources.