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General Knowledge · Q67

Practice

Competitive Exams · General Knowledge · question 67

Q67

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
Answer
D.
Carbon dioxide gas

Answer: Option C

Solution

Answer: Option C
Solution:
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.