> Tennis can be played under blacklight with relatively weak lights: https://www.youtube.com/watch?v=-x4mfQITXtM
1:14 "The balls we use are green dot balls and orange balls"
So they are not using standard yellow balls for UV light games.
1:14 "The balls we use are green dot balls and orange balls"
So they are not using standard yellow balls for UV light games.
https://www.tennis.com.au/learn/rules-and-scoring/10-and-und...
Look at the box of balls at 1:30.
> So they are not using standard yellow balls for UV light games.
A "green dot ball" is exactly the same color as a standard ball, except it has a dark green dot stamped on it.