What is spectrum and type of spectrum?

Answer 1

1. Physics. The distribution of a characteristic of a physical system or phenomenon, especially:
   1. The distribution of energy emitted by a radiant source, as by an incandescent body, arranged in order of wavelengths.
   2. The distribution of atomic or subatomic particles in a system, as in a magnetically resolved molecular beam, arranged in order of masses.
2. A graphic or photographic representation of such a distribution.
3. 1. A range of values of a quantity or set of related quantities.
   2. A broad sequence or range of related qualities, ideas, or activities: the whole spectrum of 20th-century thought.

Answer 2

A spectrum is a range of frequencies of electromagnetic radiation. There are two types of spectrum: continuous, where all wavelengths are present without gaps, and discrete, where only specific wavelengths are observed as distinct lines.