What color does the Ruby laser primarily emit?

The Ruby laser primarily emits a deep red color at a wavelength of 694 nm. This specific wavelength falls within the visible spectrum, and it is characterized by its vibrant red appearance. The unique properties of the Ruby laser stem from its gain medium, which is made of synthetic ruby crystals. When electrically excited (or optically pumped by another light source), the ruby medium facilitates the emission of light at this precise wavelength.

The deep red color of the Ruby laser is significant for various applications, including dermatological procedures, where its specific wavelength is effective in targeting pigmentation and achieving desired therapeutic results. The understanding of the wavelength and its visible spectrum is crucial when considering the uses and safety measures associated with laser technology.

The other options present wavelengths that pertain to different laser types or classifications, making them less relevant when discussing the Ruby laser specifically.