Light and Electricity: Notes of Two Courses of Lectures Before the Royal Institution of Great BritainD. Appleton, 1871 - 194 pages |
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Abbild Abbildung Abbildungen Abstand Achse acidulated water angle attraction Auflage Aufnahmen Auge Augen Augendrehpunkt Austrittspupille Band battery beam Bedeutung behandelt bei der beiden besonders Bild Bilder body Brennweite Büschel Camera obscura circuit coil colors Darstellung denen deren diamagnetic dieſe Don Prof eben Eintrittspupille electric current electricity electro-magnet Entfernung Entwicklung erhält ersten ether Fernrohr Fläche galvanometer Gebrauche Gesichtsfeld Gibt glass gleich Größe großen größere handelt häufig heat hydrogen Iceland spar kleine kleiner kommen können läßt Leinwand Licht liegt light Linse Linsen Luft magnetic metals Mikroskop Mitte Mittel modernen muß namentlich nennt Netzhaut Objekte Objektiv Objektpunkte objektseitigen Öffnung Okular Optik optische optischen Instrumente particles photographischen plate platinum polarized Privatdozent Projektion Punkte punktuell rays reflected refraction Regel retina Richtung schon Sehen sein sind sowie Strahlen surface System Teil theory tourmaline Vergrößerung verschiedene vibration voltaic weiter Winkel wire wurde zinc zwei
Popular passages
Page 28 - Why the image is seen as far behind the mirror as the object is in front of it.— Let AB be an arrow held Fig.
Page 28 - ... image of L. Moreover it will be found from the figure by direct measurement that LL' is perpendicular to the mirror and that L'A is equal to LA. Thus the image of a point formed by a plane mirror is virtual and its position is obtained by drawing a normal from the point to the mirror, and producing it as far behind the mirror as the point is in front of it. This result may be verified in the following way. EXPERIMENT (7). To verify the position of the image of a voint formed by a plane mirror.
Page 162 - ... a common candle ; quartz, the sapphire, magnesia, lime, all entered into fusion ; fragments of diamond and points of charcoal and plumbago rapidly disappeared and seemed to evaporate in it, even when the connection was made in a receiver exhausted by the air-pump ; but there was no evidence of their having previously undergone fusion.