Two identical spheres move in opposite directions with speeds `v_(1)` and `v_(2)` and pass
Channel: Doubtnut
Date: 2021-11-02

Two identical spheres move in opposite directions with speeds `v_(1)` and `v_(2)` and pass behind an opaque screen, where they may either cross without touching (Even 1) or make an elastic hand-on collision (Event 2).