Question

Calculate the theoretical diffraction-limited resolution of a 10m telescope at wave- lengths of 300 nm (UV) and 1 μm (IR). Under what circumstances might each be realized in practice

Answer 1

diffraction limit is the minimum angular separation needed for two sources to distinguish by the telescope. in this case, radiations from stars have different wavelength and so their diffraction limit also varies with that. so the small wavelength radiations will have small diffraction limit so that they are hard to distinguish.