Mirrors for multiple images - Instrument's card

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	Instrument's card

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Mirrors for multiple images

Dating

27 June 1929

Maker

Officine Galileo

The mirrors, disposed with an angle of 120, 90, 60 and 30 degree, provide a number of virtual images of the same object (a disk with a support base with a face red and the other green). The virtual images are respectively 2, 3, 5 and 11. When the mirrors are placed parallel each other give an infinite sequence of virtual aligned images.

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Mirrors for multiple images

Cataloghi	Nº	Voce
Inv. 2016	787	Mirrors for multiple images Provisional numbering!
Inv. 1870	934	Specchi piani ad angolo e specchi paralleli

Section

Optics

Window

Conditions

Complete

Working D

Intact

Large	29.0 cm (11.4 in)
Width	18.0 cm (7.1 in)
Height	14.0 cm (5.5 in)

Materials

Sources

Galileo Officine, Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1929, pag. 106, fig. 5231
Magrini R., Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1940, pag. 180, fig. L829
Privat Deschanel A., Trattato elementare di fisica, Fratelli Dumolard, Milano, 1890, pag. 764, fig. 695
Resti E., Catalogo generale di apparecchi per l'insegnamento della fisica, Ditta Emilio Resti di Franco Brambilla, Pubblicazi, Milano, 1930, pag. 53, fig. 264
Tarquini A., Apparecchi di fisica, Antonio Tarquini, Roma, 1928, pag. 69, fig. 411

The additional indications which integrate the items of the conservation's state have the following meaning: (?) = maybe complete; M = maintenance; P = partial; R = restored; D = used for teaching; NC = not checked; X = impossible to verify.

In order to avoid that instruments' cards without the english description text of the device be directly selected, I added a special filter with which only the complete cards are shown in the menu. Anyhow all the partial english instruments' cards (with instrument's dating, dimensions, state of conservation...) can always be seen even if they haven't the english description text. To read this uncomplete cards is sufficient to click, for example, on an instrument's picture or on the word "View" of the table column called "Card" every time they appear in the other pages of this database.