What is the wavelength of a ruby laser?

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Study for the 40Hr Laser Hair Removal Apprentice Test. Learn with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is the wavelength of a ruby laser?

Explanation:
A ruby laser emits a specific red wavelength because of the Cr3+ ions in a ruby (aluminum oxide) crystal. The lasing transition from the Cr3+ metastable state down to the ground state produces light at about 694 nanometers, giving a characteristic red beam around 694 nm. This energy difference is fixed by the Cr3+ ion’s electronic structure in the Al2O3 lattice, so the emitted wavelength is narrowly defined. Other wavelengths listed come from different laser systems, not the ruby laser.

A ruby laser emits a specific red wavelength because of the Cr3+ ions in a ruby (aluminum oxide) crystal. The lasing transition from the Cr3+ metastable state down to the ground state produces light at about 694 nanometers, giving a characteristic red beam around 694 nm. This energy difference is fixed by the Cr3+ ion’s electronic structure in the Al2O3 lattice, so the emitted wavelength is narrowly defined. Other wavelengths listed come from different laser systems, not the ruby laser.

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