Final answer:
A spectroscope is a device that uses a diffraction grating to separate light into different wavelengths and create a spectrum. It is commonly used by astronomers and chemists to study the composition of substances and celestial objects.
Step-by-step explanation:
A spectroscope is a device used to see a spectrum of light. It uses a diffraction grating to separate the light into different wavelengths. When a material is heated, it emits light of specific wavelengths based on its chemical makeup. Spectroscopes are commonly used by astronomers and chemists to study the composition of different substances and celestial objects.