Spectroscopes are instruments for the analysis of light, they allowed 19th century chemists to detect elements that were in quantities too small to be analyzed with traditional chemical procedures based on the color of the flame.
It is a device that is used to obtain and display a spectrum.
Gustav Kirchhoff and Robert Bunsen are credited with the invention of the spectroscope in the mid-nineteenth century, this device was used to discover features of the elements that emit light.
Therefore, we can conclude that spectroscopy enabled 19th-century chemists to detect elements such as rubidium, cesium, thallium, and indium in qualitative analyzes based on flame color.
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