Cerebellum; The cerebellum is located at the back of the head. Just in case you need to know where it is located at :D
A spectroscope
Explanation:
The color of the light emitted by her flashlight can best be studied using a spectroscope.
Spectroscope is an instrument used to observe the light emitted by a substance.
Just like a prism, it splits up light using its different wavelengths.
The light entering the scope is split into its different component parts.
learn more:
Diffraction brainly.com/question/3183125
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Which signal are you talking about?
