A Third Year's Course in Practical Physics

Excerpt from A Third Year's Course in Practical Physics

Optics is such a wide subject that only a small part can be taken in a year's course, and the difficulty is to select the most suitable sections. Those chosen may be classed, with the exception of Chapters I. And II., under the term Pin Optics. The apparatus required is of the simplest - a few plane mirrors, curved mirrors, lenses (ordinary spectacle glasses do very well), and prisms. A cheap form of holder for the mirrors and lenses is shown on p. 39. Made of thin metal, this holder can be bent to hold lenses from about 1 to 5 cm. Diameter. An optical bench is not required for any of the experiments.

Chapters I. And II. May be taken at the beginning of the session or left till the end. The experiments described in these two chapters are easy and interesting, and form a good introduction to the subject of light.

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