🚀 go-pugleaf

-Gregory R. Snow of Smithfield High School wrote


I recently saw a demonstration about a strang effect of pendulums when
viewed through a filter.  If you take a piece of red plastic (plastic wrap
works fine) and place it in front of one eye, leave the other eye uncovered,
and view a swinging pendulum. It appears that the pendulum is moving in an
eliptical shape instead of the expected side to side motion.  The person
giving the demo could not explain why this happens.

This points out a danger of demonstrations. If you do a demo you should be
prepared to explain "why"
The effect is in the eye/brain connection and will work with any filter
even grey.
Well there are two hints!
Paul



Paul Hickman
Physics
Belmont HS