When did the non-semiconductor laser developed?

Question

Quizplus · Accepted Answer

The first non-semiconductor laser, specifically a gas laser (helium-neon laser), was developed in 1960, not 1985. However, none of the provided options correctly matches the historical development of non-semiconductor lasers. The correct year for the development of the first laser (a ruby laser, which is also not a semiconductor laser) is 1960, which is not listed among the options. Therefore, the question seems to contain a factual error regarding the dates and the development of non-semiconductor lasers.

When Did the Non-Semiconductor Laser Developed