![]() ![]() Sometimes astronomers use the term blackbody spectrum for a thermal spectrum. For now, let's look at a thermal spectrum. Exotic objects like neutron stars and black holes can produce another type of continuous spectrum called synchrotron spectrum from charged particles swirling around magnetic fields, but I will discuss them in another chapter later on. A discrete spectrum is more complex because it depends on temperature and other things like the chemical composition of the object, the gas density, surface gravity, speed, etc. A thermal spectrum is the simplest type of spectrum because its shape depends on only the temperature. ![]() Any solid, liquid and dense (thick) gas at a temperature above absolute zero will produce a thermal spectrum. The continuous spectrum from these kinds of objects is also called a thermal spectrum, because hot, dense objects will emit electromagnetic radiation at all wavelengths or colors. Most continuous spectra are from hot, dense objects like stars, planets, or moons. Astronomers usually refer to the two types of discrete spectra: emission lines (bright lines) and absorption lines (dark lines in an otherwise continuous spectrum) as different types of spectra.Ī rainbow is an example of a continuous spectrum. Passing a continuous beam of radiation through cool gas will produce absorption lines at precisely the same frequencies as are present in the gas's emission spectrum. There are two basic types of spectra: continuous spectrum (energy at all wavelengths) and discrete spectrum (energy at only certain wavelengths). A hot gas may instead produce an emission spectrum, consisting only of a few well-defined emission lines of specific frequencies, or colors. When light is passed through a prism or a diffraction grating to produce a spectrum, the type of spectrum you will see depends on what kind of object is producing the light. Many hot objects emit a continuous spectrum of radiation, containing light of all wavelengths. Theoretical Explanation of Continuous Spectrum Concepts of Physics by HC Verma for JEE.IIT JEE Coaching For Foundation Classes. ![]()
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