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Jul
16
comment Is there a physical reason steel balls are not suitable to play billiards with?
more rotational inertia for same mass and less friction with steel would make for a more boring game as the physics of sides and bottoms and back spin would be less sensitive to "english". It could also be annoying with a less solid hollow golf driver boing sound as the sphere deforms causing unexpected results. The balls are fine and solid and exchange energy fine with the materials used now and have a nice solid muted sound as it should be. Perhaps exotic carbon filled epoxy ceramic hybrids are possible at a $300/ball like my Experimental Yamaha golf drivers 10 yrs ago. I love, but old tech
Jul
16
awarded  Teacher
Jul
16
answered Is there a physical reason steel balls are not suitable to play billiards with?
Jul
16
comment Phase shift of 180 degrees on reflection from optically denser medium
If you are familiar with the s parameters of transmission line theory then you may recognize the reflection coefficient of a denser medium is like a reflector with partial reflection. Electrical and optical properties have duality. As an EE who understands these in RF and optical reflections with phase inversion is like a lower impedance or reactance due to increase in permittivity has its analogy in optical transmission properties.
Jul
16
awarded  Autobiographer
May
9
answered Phase shift of 180 degrees on reflection from optically denser medium