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School University (1), Spano (2) |
 (2)
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Function To deduce the number of the images of the same subject formed by two angular mirrors. | |||
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Description If n is the number of the virtual images and a the angle between the two mirrors, we have n = 360/a - 1. The two plane mirrors, assembled on a brass frame can turn because they are hinged on a steel axis, supported by a vertical column. By unthreading the axis of the hinge, the two mirrors can be fixed vertically on the basis by four brass buttons, and so we have an apparatus with parallel mirrors with an infinite succession of images. A disk with one side red and the other green is supported by a metallic foot and is used as the object. | |||
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School Spano |
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Function To study the characteristics of convex mirrors. | |||
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Description The mirror has a 20 cm diameter. The 50 cm focal distance is the best for normal optics experiments. The frame is made of a brass ring turning around a horizontal diameter, supported by a fork with changeable height, placed on a cast iron tripod, with a brass column raising and turning on the vertical axis. | |||
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School University |
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Function To study the characteristics of concave mirrors. | |||
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Description The mirror is fixed on a black wooden frame rotating on a horizontal diameter and it is sustained by a fork that is applied to pole raising from a wooden circular basis. | |||
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School Spano |
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Function To study the characteristics of parabolic mirrors. | |||
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Description Mirror with a metallic frame turning around a horizontal diameter. The ensemble is sustained by a solid iron prismatic frame. | |||
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School Spano |
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Function To show the distortion of the image. | |||
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Description The cylindrical reflecting glass surface is placed on a metallic frame; size 130 x 190 mm. | |||
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School Spano |
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Function Toy that can supply new ideas for geometrical designs. | |||
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Description It is made with a cardboard tube covered with imitation leather and brass trimmings at the ends. The case that holds the coloured objects is turning on its axis and the objects stand between two glasses, one of them polished with emery. The reflecting strips are black glasses 30 degree inclined. All the parts are fixed with screws and can be dismounted. | |||
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School University (1); Spano (2) |
 (1)
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Function For studies on geometrical optics. | |||
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Description The above bar slides at friction; both can be fixed on the chosen position with set screws. In this way the lens centring is made quickly, as it regards only the height. The apparatus is used for lenses from 15 mm. to 100 mm. | |||
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School University |
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Function For studies on geometrical optics. | |||
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Description The lenses of 75 mm diameter are mounted on brass feet with variable height applied on iron tripods. | |||
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School University |
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Function For studies on geometrical optics. | |||
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Description The lenses of 75 mm diameter are mounted on rings rotating on a horizontal diameter. The rings are sustained by forks with variable height placed on a circular basis. The ensemble in made of brass. | |||
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School University |
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Function For studies on geometrical optics. | |||
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Description A set of lenses of 65 mm diameter placed in a wooden box. All the types of spherical lenses are present.
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School Spano |
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Function For studies on geometrical optics. | |||
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Description A set of lenses, diameter 70 mm, are mounted on rings rotating on a horizontal diameter. The rings are sustained by fork with variable height placed on a circular basis. The ensemble in made of brass.. All the types of spherical lenses are present.
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