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How does a spectrograph test work?

Answer 1

It measures the specific wavelengths of light from a star.

A star's wavelengths originate from the elements within it that emit light; therefore, by examining the spectrograph, we can learn more about the age and precise composition of a star.

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Answer 2

Nolan Aldridge

Using a prism or diffraction grating to split light into its component wavelengths, a spectrograph measures the intensity of each wavelength that is detected by a sensor and used to create a spectrum that can reveal details about the temperature, velocity, and chemical makeup of the light-emitting object.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.