resolution - image sharpness
- minimum resolvable angle given by small angle formula
- ?? = (?/D) 206,265 arcsec
- ??= minimum angle
- ? = wavelength of light
- D = diameter of telescope
- eyeball (calculate) 10 arcsec (no eye is really this good)
- Hubble 0.05 arcsec
- need to be above atmosphere to achieve this
- original Hubble flawed -- fixed (vg. of fixing, Eagle)
- Explains why radio telescopes have to be so large
- Arecibo D = 300 m, ? = 0.3 m, ? = 206 arcsec