The speaker says that observing at higher frequencies is limited by quantum uncertainty: some particles cannot be observed, or observation destroys them.

“legends that would have this number of sensors but then you go in the next dimension which is the frequency you know all the way down to gamma rays and you can start to try to observe and you get into basically the upper bounds or i guess in this case lower bounds uh or upper bounds in terms of frequency is basically quantum uncertainty like you just cannot observe certain particles”

“or you destroy”