Sensitivity and Resolution of Telescopes
Two central aspects of telescopes are sensitivity and resolution. Sensitivity is the ability to see faint objects and resolution is the ability to distinguish two objects which are close together. Jeff Stanger explains these concepts at the Faulkes Telescope South at Siding Spring Observatory near Coonabarabran, NSW.
Sample examination question
Discuss how the development of adaptive optics and at least one other development have improved resolution and sensitivity of ground based astronomy.