My parallel universe has the speed of light set at half that of Earth's (1.5*10^8 m/s).
How would a Badminton player (P.V Bindu) from Dearth (my universe) fare against a player (P.V Sindhu) from Earth ?
Match Venue: India, Earth (your universe)
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The biggest problem with this is that everything involving electrons changes drastically which means that molecules would be different and certainly not compatible. Not only electrons of course, but mainly them.
My guess is that the player that tries to enter the other universe disintegrates very quickly. If the speed of light is the only thing that changes, there might not even be people in that universe because molecules would look so different.
Edit: I should note of course that the other universe would be completely different and nothing would exist as we know it, but let's ignore that part and focus on the players turning into a pile of "something".
This answer started as a comment. This that comment: This probably depends on which universe they play in and whether their speed of light adjusts to whichever universe they are in. Which would affect their playing exactly how?
Exactly how seems to be, most probably, absolutely not at all (where most probably means with a probability of one hundred percent, or complete certainty).
It also seems unlikely that relativistic effects play any part in their badminton playing -- assuming that their atoms and molecules are governed by the same value of lightspeed. if this is so, it might affect the behaviour of their electrons and thus the biochemistry of the player who is the other universe might be affected. if those affects are adverse to his playing, then he is in trouble and could possibly lose the match.
However, in the interests of fair play the Multiverse Badmintion Premiership League should arrange all matches are played with each player located in his or her own universe. By using a wormhole (or to be strictly correct, an Einstein-Rosen bridge) and the players play at either end where their material bodies are governed by their own set of physical laws. Now it is simply a matter of which player is the more skillful. This is not a matter for science to decide, but is firmly in the realm of sports and therefore undecidable by rational means.
So place your bets, ladies and gentlebeings, and may the better player win.
Speed of light would affect the match in two ways:
I have no specific knowledge of badminton, but let's say a skilled player can hit the "ball" at 100 km/h. That is 28 m/s. In both cases that speed is peanuts when compared to the speed of light for both Sindu and Bindu. There would be no difference in the gameplay of the two.
Signal processing in our brain takes about milliseconds, which is way more than the time photons need to go from the "viewed object" to the "viewer" on a badminton court, which is in the range of tens of nanoseconds. Again, no appreciable difference.
PV.sindhu vs PV.bindhu in both the universe , result ll be the same.
Depends not only speed of light and depends on various factors.
Replies are welcome.