Seven Brief Lessons on Physics

saying that things ‘here’ exist, whereas things which are not ‘here’ do not exist. So then why do we say that things that are ‘now’ exist and that everything else doesn’t?

and which can only be produced and absorbed as complete units

energy quanta’ which are localized at points in space, which move without dividing

Einstein showed that light is made of packets: particles of light. Today we call these ‘photons

quanta’, that is, in packets or lumps of energy

The two pillars of twentieth-century physics – general relativity, of which I spoke in the first lesson and quantum mechanics, which I’m dealing with here – could not be more different from each other.

what’s non-apparent is much vaster than what’s apparent

They are not in a space because they are themselves the space.

There are only elementary processes wherein quanta of space and matter continually interact with each other

There is no longer space which ‘contains’ the world, and there is no longer time ‘in which’ events occur.