What is the counterpart (physical appearance) of watch glass (chemistry) in physics??

Question

What is the counterpart (physical appearance) of watch glass (chemistry) in physics??

Answer 1

Well, that would depend on which branch of physics you're inerested in. For high energy particle physics, the counterpart would be the Cloud Chamber. This is where physicists would look for the trails of  particles in the aftermath of a high energy collision.

For Astrophysics or Cosmology, the looking glass would be "the Universe".

For Theoritical Physics, the looking glass is the "mind".