Explain the advantages of a reflecting telescope compared to a refracting telescope

Mirrors can be made much larger than lenses (meters compared to around 1m max). Mirrors do not produce chromatic aberration. Mirror glass does not need to be as high quality as lens glass. Mirrors produce less circular aberration than lenses

Related Physics A Level answers

All answers ▸

A DVD is dropped from rest. The DVD does not reach terminal velocity before it hits the ground. Explain how the acceleration of the DVD varies from the instant it is dropped until just before it hits the ground.


How does the strong nuclear force between two nucleons varies with separation of the nucleons. Please detail the range over which the force acts.


why does photoelectric emission occur only when there is a certain threshold frequency of incident radiation?


Show that gravitational force within a nuclei is negilible compared with the electric repulsion.