The finite measurement of your Airy disk sets an unavoidable limit to your probable resolving power of a visual instrument. Rayleigh observed that two adjacent and equally shiny stars can just be resolved Should the image of 1 star falls someplace near the innermost dim ring during the Airy disk https://opticiansnearme11086.verybigblog.com/29434513/top-guidelines-of-6x9-speakers