Uploaded April 2020 | Updated September 2026, 2 weeks ago
We shine three lasers into a concave mirror and use water vapor from dry ice to show where the beams converge on the focal point, and then diverge again. Its a beautiful demonstration of the focal point.
We shine three lasers into a concave mirror and use water vapor from dry ice to show where the beams converge on the focal point, and then diverge again. Its a beautiful demonstration of the focal point.










