On Sunday, January 6, 2019 at 12:53:52 AM UTC-7, Brent wrote: > > To measure small things you need comparably short wavelengths. If you > make a photon with a wavelength so short it can measure the Planck > length it will have so much mass-energy that it will fold spacetime > around it and become a black hole...so you won't be able to use it to > measure anything. > > Brent >
I understand the BH issue. But suppose we want to measure the diameter of a proton and use photons of large wave length, say of radio frequency. If we're looking for a shadow on a screen, why won't the large wavelength leave a discernible shadow of the proton? Or is it the back scattering we look for? Same question; that is, why must the impinging wavelength be of comparable length to measure a physical object of the same approximate length? TIA, AG > > On 1/5/2019 11:39 PM, [email protected] <javascript:> wrote: > > What is the argument for the claim that we cannot, in principle, > > measure any length smaller than Planck length? TIA, AG > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/7e2e2b07-749a-442d-8109-3ce68a51d924%40googlegroups.com.
