Instruments

Spectroscope

Citation Formats

General Reference

Science Atlas. "Spectroscope." Accessed August 30, 2026. https://dev-science.interactiveatlas.org/instruments/spectroscope.

APA Style

Science Atlas. (n.d.). Spectroscope. Retrieved August 30, 2026, from https://dev-science.interactiveatlas.org/instruments/spectroscope

BibTeX

@misc{scienceatlas-spectroscope,
  author = {Science Atlas},
  title = {Spectroscope},
  year = {2026},
  url = {https://dev-science.interactiveatlas.org/instruments/spectroscope},
  note = {Accessed August 30, 2026}
}

A spectroscope splits light into its component colors, typically with a prism or a finely ruled grating, and lets an observer measure the exact wavelengths present. Joseph von Fraunhofer built an early precision version around 1814 to study dark lines in the Sun's spectrum, and Robert Bunsen and Gustav Kirchhoff showed in 1859 that each chemical element produces its own distinctive set of spectral lines, turning the instrument into a way to identify what a glowing object, including a distant star, is made of without ever touching it.

Facts

Invented Year

1814 1

the subject's own accountDated to Joseph von Fraunhofer's precision spectroscope of around 1814; Bunsen and Kirchhoff's 1859 work established its use for chemical identification rather than inventing the instrument itself.

Measuresthe subject's own account

The irradiance (intensity) of light as a function of wavelength, or other properties such as polarization state. 1

Operating Principlethe subject's own account

Separates light into its component wavelengths with a diffraction grating in modern instruments, or a prism in the original design, read by a photodetector. 1

Operating Rangethe subject's own account

As a class, spectroscopes span from gamma rays and X-rays into the far infrared, though any one instrument is built for a specific band. 1

Open Questions

Resolution

Not stated as a numeric figure in the cited source.

No resolution figure given. Retry without SourceSlug after ambiguous duplicate citation rejection (FactQueueId 884).

Cross-Tradition Connections

Invented By

Gustav Kirchhoff

Credited jointly with Robert Bunsen for the 1859 development of practical spectral analysis.

Source Kirchhoff and Bunsen on Spectroscopy (ChemTeam)Gustav Kirchhoff and Robert Bunsen

Joseph von Fraunhofer

Built a precision spectroscope around 1814 to test the optical glass he manufactured, discovering hundreds of dark absorption lines in the sun's spectrum now called Fraunhofer lines.

Source Spectroscope (Wikipedia)

Robert Bunsen

Credited jointly with Gustav Kirchhoff for the 1859 development of practical spectral analysis.

Source Kirchhoff and Bunsen on Spectroscopy (ChemTeam)Gustav Kirchhoff and Robert Bunsen