Answer:
Step-by-step explanation:
Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars.
When matter is very hot it emits light. This light, when seen through a prism or diffraction grating, shows all wavelengths of visible light. This is called a continuous emission spectrum. A light source, such as a star or a filament bulb, gives a continuous emission spectrum.
When a gas is very hot, it doesn’t emit all wavelengths of light. Hot gases don’t produce a continuous emission spectrum.