General knowledge:: Technology

@ : Home > General knowledge > Technology > Section 1 - Discussion

What was the active medium used in the first working laser ever constructed?

A. A diamond block B. Helium-neon gas
C. A ruby rod D. Carbon dioxide gas

Answer: Option C


Theodore Maiman built the first working laser using a ruby rod while working at Hughes Research Laboratories in Malibu, California. It lased for the first time on May 16, 1960.

Write your comments here:
Name *:     Email: