Civil Services UPSC CAPF (Assistant Commandants) Test Series 2025 General Knowledge Science Technology and Inventions
With reference to the first-man made Ruby Laser, which of the following statement/s is/are correct?
(1) Ruby Laser produced pulses of blue light.
(2) Ruby Laser produced pulses of red light.
Select the correct answer using the code given below:
1
Neither 1 nor 2
2
Both 1 and 2
3
Only 2
4
Only 1