Answer: Spectroscope
Explanation: Because a Spectroscope observes light.
The stars are the gaseous celestial illuminating objects. The stars emit a band of white light, which constitutes primarily of band of red, orange, yellow, blue, and green color bands.
The scientist will use the instrument spectroscope to view the different colors of light.
Astronomical spectroscopy can be defined as:
1. Astronomical spectroscopy is used to study chemical composition, measure the radiations of lights, infrared rays, X-rays, and radio waves.
2. The spectrograph measures the constituents of the stars and separates the light into corresponding wavelengths.
3. The spectroscope of the starlight produces a rainbow effect. The composition of different colors of the spectrum will help in the study of stars.
Thus, the scientist will use the spectrometer to study the wavelength of the different bands of light.
To know more about spectrometers, refer to the following link:
https://brainly.com/question/4172177
