What is the amplitude of light in physical dimensions?

the brightness of light is based on its' amplitude.  But really you are just repeating yourself.    If light is a transverse wave then a light wave's crest should have a height.   You can measure the height of a physical wave.  Why can't you measure the height of a light wave?  A light wave's height should be measurable in inches or cm or some unit of length.  If it's not measurable as a physically length then that would prove light's amplitude exists in another dimension.


If space can be distorted then couldn't light waves be waves in this flexible space?  Anything flexible can have waves in it.  That's what the ether was.   In a way though isn't space if it is flexible and can be bent then isn't it just a kind of ether?   In a way special and general relativity contradict each other because one is based on the idea that there is no either at all.   The other is based on the idea that there is an ether called space.  It seems so simple and so I have to assume that I'm just being too simple.  But sometimes a thought comes to mind and just flits right out when it's too simple.

I really feel like we need good graphical representations of things.  It's hard for me to imagine that theoretical physicists are able to work without some kind of visual aids to what they are working on.  They work with math but the universe may not be a computer program.  If it's not then how would you be able to break all physics down to a single mathematical formula?  

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