The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. If suc
Posted: Thu Jul 14, 2022 8:06 pm
The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. If such a laser beam is projected onto a circular spot 1.266 mm in diameter. what is its intensity?