What is the wavelength of ruby laser light?

The wavelength of ruby laser light, which typically operates in the red part of the visible spectrum, is 694 nm. This characteristic wavelength is a result of the specific energy transitions of the chromium ions that are doped into the ruby crystal. When these ions are excited by an external energy source, they emit light at this distinct wavelength as they return to their ground state.

In the context of laser technology, this particular wavelength is significant for applications such as dermatological treatments and certain types of industrial laser operations, as it can penetrate the skin effectively while being absorbed by different types of tissue. Understanding the specific wavelength of ruby lasers is essential for practitioners using these devices to ensure they select the appropriate settings for the intended treatment or procedure.