Fig. 75. fig. 75. It is clear that pq is the real image of an image PQwhich would be formed by the rays if they were not inter-cepted by the mirror before reaching PQ. 62-64-] REFLEXION AT SPHERICAL SURFACES. 105 64. To draw the rays by which an eye sees theimage of an object formed by reflexion in… … Fig. 76. of the mirror; in the figure, for the sake of clearness, thisdistance is somewhat exaggerated. Draw a pencil of raysdiverging from q and falling on the pupil of the eye. Producethese rays back to meet the mirror in R, R. Join RQ andKQ, then the pencil QR, QR is reflected stT as to…
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-78-23.webp)