Recent content by Pedsam2

I was asked this question by a student and would like to give a knowledgeable response, how should I respond to the following question: "I would like to experiment with blue, red, and green 5mw lasers pointer pens for my physics class to use in diffraction experiments. I want to use these with...

Thank you!

Come on guys I need something definitive.

Actually I was asking if there is a laser that has no limit! But if the 658nm red laser is terrible for star gazing which one is best?

Does anyone have any idea of which Astronomy red laser pointer has a limited distance of infinity?

Bringing up the rear, I am 56 an climbing

The dominant color of a laser is red and or green and as we progress there are more colors coming into play. Can anyone say what is the significance of the colors and the intended use or benefit to be derived from the different colors? Pancho