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Read the Light of the UniverseModule 2Messages Hidden in a Spectrum
Module 2 / Lesson 5 of 2425 min
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How Do We Turn Light into a Spectrum?

How can a prism or diffraction grating turn one beam into a measurement across wavelength?

Follow light through an entrance slit, dispersing element, detector, and wavelength calibration.

A narrow beam from a telescope passes through a slit and diffraction grating before spreading into a precise spectrum on a detector.
Vastward artistic reconstruction of a spectrograph evidence chain.

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