> When a neutrino hits a nucleus, the blue light emitting particle in ice follows the same direction.
How does this not violate conservation of momentum? Are you saying every single collision is head-on?
How does this not violate conservation of momentum? Are you saying every single collision is head-on?
In other cases, the particle being collided is scattered and won't show up in the detector. Low energy neutrino collisions also have very faint light and difficult to detect. Solar system produced neutrinos are in this category.