Electromagnetic Radiation
| Formula / Notation | E = hν = hc/λ; c = 3×10⁸ m/s |
|---|---|
| Also Known As | EM radiation; light; photon; radiation (electromagnetic); EMR; electromagnetic wave |
What is Electromagnetic Radiation?
Electromagnetic radiation is a form of energy that propagates through space as oscillating electric and magnetic fields. It spans the electromagnetic spectrum from radio waves (long wavelength, low energy) to gamma rays (short wavelength, high energy). All electromagnetic radiation travels at the speed of light (c = 3 × 10⁸ m/s) in a vacuum and exhibits both wave and particle (photon) properties.
Formula & Notation
Other Names / Synonyms: EM radiation; light; photon; radiation (electromagnetic); EMR; electromagnetic wave
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Electromagnetic radiation is a form of energy that propagates through space as oscillating electric and magnetic fields. It spans the electromagnetic spectrum from radio waves (long wavelength, low energy) to gamma rays (short wavelength, high energy). All electromagnetic radiation travels at the speed of light (c = 3 × 10⁸ m/s) in a vacuum and exhibits both wave and particle (photon) properties.
Spectroscopy and analytical chemistry (UV-Vis, IR, NMR, X-ray); telecommunications; medical imaging (X-ray, MRI, CT); radiation therapy; solar energy; photochemistry; food irradiation
High-energy radiation (UV, X-ray, gamma) is ionising and poses radiation hazard — can damage DNA, cause cancer. Non-ionising radiation (radio, microwave, IR) has thermal effects. UV exposure causes sunburn and skin cancer. Appropriate shielding and exposure limits apply.
The formula or notation for Electromagnetic Radiation is: E = hν = hc/λ; c = 3×10⁸ m/s