Red Beam

How do I make a visible red laser?

Is it possible for a red laser beam to be seen from the diode on the wall? Be a fog machine works, but I hope there are other ways, without having to buy a green laser.

Smoke or fog will work. There are also around 100mW red laser (wickedlasers.com should be the case) that have some visibility in daylight, but it depends always the existence of something (even more modest, the amount of dust) in air compared to the dispersion.

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