The honest frontier

Questions with
no neat ending.

Some are open to the whole field. Others are simply open to me. Keeping both visible is part of learning well.

measurementmy questionjust opened

What does ‘observation’ physically mean in quantum mechanics?

The double-slit experiment makes it tempting to say particles change their behavior when they are watched. I want to understand what counts as measurement, why human attention is irrelevant, and how the availability of path information changes the result.