What is the most commonly accepted wavelength range for visible light?

The most commonly accepted wavelength range for visible light is indeed from 400 to 700 nm. This range corresponds to the portion of the electromagnetic spectrum that the human eye can detect. Within this range, different wavelengths correspond to different colors, with violet light around 400 nm and red light approaching 700 nm.

Understanding this range is fundamental in various fields, such as optics, photography, and more importantly in the context of laser training, where specific wavelengths can influence how light interacts with different materials. For example, certain medical and cosmetic laser applications utilize light within the visible spectrum to target specific tissues or pigments.

Other options fall outside the boundaries of the visible spectrum. Wavelengths below 400 nm fall into the ultraviolet range, while those above 700 nm transition into the infrared range, both of which are not visible to the human eye. Recognizing these limits not only aids in understanding human perception of light but is also crucial when discussing applications involving lasers and their interaction with various substances.