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Electromagnetic spectrum

Definition

The electromagnetic spectrum encompasses all types of electromagnetic radiation, ranging from gamma rays with the shortest wavelengths to radio waves with the longest wavelengths. In organic chemistry, it plays a crucial role in structure determination by providing information about molecular vibrations and ion fragmentation patterns.

Analogy

Imagine the electromagnetic spectrum as a grand piano keyboard. Each key represents a different type of electromagnetic radiation, from the high-pitched gamma rays on the left end (short wavelength) to the low-pitched radio waves on the right end (long wavelength). Just as each note on a piano can create different sounds, each type of radiation in the electromagnetic spectrum has unique properties used in spectroscopy to "hear" the structure of molecules.

Related terms

Infrared Spectroscopy: A technique that measures how molecules absorb infrared light, revealing details about their chemical bonds and molecular structures.

Mass Spectrometry: An analytical method that ionizes chemical species and sorts the ions based on their mass-to-charge ratio, used for determining molecular weights and structures.

Wavelength: The distance between successive crests of a wave, which determines its energy and type within the electromagnetic spectrum

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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.