Gravitational Lensing #2 Magnification

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In this video I will introduce the concepts of magnification, which will then lead to convergence and shear.

This shall, as I have been stating numerous times not, not be seen as a formal introduction to gravitational lensing. This is an introduction that I give in order for people to follow some of the methods and results that I will later present.

A more formal introduction can be found here:
The sound and video quality is, unfortunately, bad.
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