True or False: All laser light is visible.

The statement that all laser light is visible is false. Laser light can exist across a broad spectrum, including wavelengths that are both visible and invisible to the human eye. For instance, lasers emitting light in the infrared or ultraviolet ranges are not visible, yet they are still very effective at their intended uses.

The visible spectrum is just a small part of the electromagnetic spectrum, and many lasers are designed to operate outside of this range for specific applications, such as communication, medical treatments, and industrial uses. Therefore, laser light encompasses a variety of wavelengths, and only a portion of that is within the visible spectrum, making the assertion that all laser light is visible incorrect.