WOW! What a statement! You are saying that observation and measurement are very similar. I could post definitions for observation and measurement to show you that they have very different meanings, but you can do that if you do not agree.

 

You've raised argumentum ad Merriam-Webster to an art form.

 

Using different definitions of a word to support your argument and rebut another's is equivocation. You have to use the physics definitions of terms in a physics discussion. In QM, and particularly in the context used here, observation and measurement are similar in meaning. One can observe that a photon is red, or measure that it has a wavelength of 632 nm. Both require photons be emitted or scattered, which was the point.

I think that my question is quite relevant, so do many other inquisitive minds.

 

Where are these inquisitive minds? All I can see here is obvious trolling.