Resolving and collecting power of telescopes (AQA A-Level Physics): Quizzes

Ability to distinguish two close objects

Diffraction of electromagnetic waves

Diffraction pattern with central disc

Diameter of the objective

Angular separation equals $\frac{\lambda}{D}$

Use larger diameter or shorter wavelength

3600 arcseconds

Proportional to $D^2$

Four times

Central max of one at first min of other