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- emission of optical radiation when a substance is exposed to any type of electromagnetic radiation, where the emitted radiation generally appears within 10 ns after the excitation. Fluorescence is due to an "allowed" transition generally from an excited singlet state to a ground singlet state.
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The energy of a light wave is proportional to the square of the amplitude of oscillation of the electromagnetic wave. These are two completely different models of light, classical vs quantum mechanical.
Radio waves are a type of electromagnetic (EM) radiation with wavelengths in the electromagnetic spectrum longer than infrared light. They have have frequencies from 300 GHz to as low as 3 kHz, and corresponding wavelengths from 1 millimeter to 100 kilometers.
May 24, 2024 · Figure 2.1.1 – Electromagnetic Wave. The red arrows in the figure above represent electric field vectors, and blue arrows magnetic field vectors. Specifically, this is a plane-polarized EM wave, which means the field vectors of a given type remain in a single plane.
The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.
Sep 30, 2022 · Most stars emit the bulk of their electromagnetic energy as visible light, that sliver of the spectrum our eyes can see. Hotter stars emit higher energy light, so the color of the star indicates how hot it is. This means that red stars are cool, while blue stars are hot.
Learn how electromagnetic waves are formed from changing electric and magnetic fields. Understand the electromagnetic spectrum, including different regions from visible light to gamma rays and their uses. Created by David SantoPietro.
- 11 min
- David SantoPietro
The excited electrons in a gas emit a discrete spectrum. The wavelength of a light wave is inversely proportional to its frequency. Light is often described by it's wavelength in a vacuum. Light ranges in wavelength from 400 nm on the violet end to 700 nm on the red end of the visible spectrum.
