2.1: What You Should Know and be able to do After Studying This Chapter

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Sep 16, 2022
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- 2: Geometrical Optics
- 2.2: Introduction

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Principle of Fermat.
Understand the approximation made in Gaussian geometrical optics.
Know how to work with the sign convention of the Lens Maker’s Formula (not the derivation of the formula).
Understand how the Lens Maker’s Formula of a single lens follows from the formula for a single interface.
Understand how the image of two and more lenses is derived from that of a single lens by construction and by computing the intermediate images. You do not need to know the imaging equation and the formulae for the focal distances of two thin lenses.
Understand the matrix method (you do not need to know the matrices by hart).
Understand the modification of the lens model to incorporate a thick lens.
Understand the limitations of geometrical optics, in particular when diffraction optics is needed.

Nice software for practicing geometrical optics: https://www.geogebra.org/m/X8RuneVy

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