» Bunsen Spectroscope (0770)

Immagini

DESCRIPTION

The Bunsen spectroscope is composed of essentially three elements: a collimator (A), a prism (P) placed on a metal disk and a telescope (B) (see design-1). In this spectroscope there is a second collimator (C) that facilitates taking measurements. The entire assembly is mounted on a metal column with a tripod base. The collimator A is a metal tube containing lenses and an adjustable slit F in front of which one places the light source S of which one desires to analyze the spectrum. The lenses in the collimator generate a parallel beam that encounters the prism. The spectrum resulting from the refraction in the prism is observed through the telescope.

The telescope B receives also the rays, reflected on the face of the prism, coming from the collimator C. This collimator has on the end a graduated scale M with transparent subdivisions on an opaque background that is illuminated by the lamp L (see figure 1). Thanks to this arrangement, the observer can see the grauated scale superposed on the spectroscopic lines and thus can measure their positions. The wave length of the spectral lines are determined by comparison with the lines of a known reference element with known wave length. The KrussKruss Spectroscope spectroscope is a similar model

ISCRIZIONI

Sotto all'oculare è scritto il numero 675
iscrizione incisa : "A. Kruss Hamburg"

BIBLIOGRAPHY

[1] Amédée Guillemin, The Forces of Nature, Third Edition, trans. by Mrs. Norman Lockyer (MacMillan and Co., London, 1877), pp 327-328
[2] Leandro Segalin,"FISICA SPERIMENTALE “, Vol. II, Paravia, 1933, p. 13

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