A helium-neon laser has a power output of 1mW of light of wavelength 632.8 nm. Q. - YouTube
Helium Neon laser construction and working I 3 Advantage and disadvantage.
Helium–neon laser - Wikipedia
15.6: The Helium-Neon Laser - Chemistry LibreTexts
Helium–neon laser - Wikipedia
Calibration and Testing of Laser Wavelength Standards - PTB.de
Solved I used a He-Ne Laser, wavelength = 632.8 nm, and | Chegg.com
Why can't helium alone produce laser in an HeNe laser? - Quora
SOLVED:(II) A parallel beam of light from a He-Ne laser, with a wavelength 633 nm, falls on two very narrow slits 0.068mm apart. How far apart are the fringes in the center