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Re: convert light into energy

Leigh Palmer wrote:

... Energy is not a thing; it is not real. It is just a number
that we calculate by canon. ...

The same is true for temperature, force, speed, acceleration,
mass, charge, angle, number, wavelength, color, etc. We invent
concepts to describe things (real objects) and their interactions.
How can a physicist disagree with this?
Ludwik Kowalski