Which property is NOT associated with laser light?

Laser light is characterized by several distinct properties, two of which are critical for its effectiveness in applications like hair removal. Monochromatic means that laser light contains a single wavelength, which is crucial for targeting specific chromophores in the hair for efficient absorption. Coherency refers to the property that the light waves are in phase and have a fixed relationship in time and space, leading to a concentrated energy output that can be precisely directed.

Directional characteristics mean that laser light travels in parallel beams, allowing for focused energy delivery to very specific areas, which further enhances its efficiency in treatments such as hair removal.

In contrast, broadband light refers to the presence of multiple wavelengths and is more characteristic of sources like incandescent bulbs or intense pulsed light (IPL) devices rather than lasers. This broad spectrum, while useful in certain applications, does not fit the defined properties of laser light, making it the correct choice for what is not associated with laser light.