Line emision spectrum of thallium and sodium.

Line emision spectrum of thallium and sodium.
2 5 c m
40cm
actual image size: 32cm x 17cm

Description

Illustration c 1970s. Emision spectroscopy is the study of the characteristic series of sharp lines in the spectrum produced when an element is heated. It is used to determine the identity or amount present of an unknown chemical substance.

© Science Museum / Science & Society Picture Library

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