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Glossary term: 전자기복사

Description: 전기와 자기의 현상을 연구하던 19세기 물리학자들은 근처에 전하가 없어도 전기장과 자기장이 상호 유도 작용에 의해 파동의 형태로 공간을 통해 빛의 속도로 전파될 수 있다는 사실을 발견했습니다. 이러한 파동을 전자기파 또는 전자기복사라고 합니다. 기본 전자기파를 파장에 따라 분류했을 때, 단파장에서 장파장에 이르는 전자기스펙트럼에는 감마선, X-선, 자외선, 가시광선, 적외선, 서브미리파, 전파(밀리미터파/마이크로파 포함)가 포함됩니다. 천문학에서는 먼 천체로부터의 전자기복사가 해당 천체에 대한 정보를 제공해주는 가장 중요한 원천입니다.

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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Related Diagrams


Three curves with radiation on the y-axis & wavelength on the x-axis. The cooler curves have redder & lower peaks

Blackbody Radiation

Caption: The curves of emitted radiation from blackbodies of different temperatures. The x-axis shows wavelength and the y-axis shows the amount of energy emitted every second by a square meter of the surface of that blackbody at each wavelength. The hotter the body, the shorter the wavelength and the bluer the light it emits its maximum amount of energy at. Despite the coolest body in this plot peaking in red light, the other hotter bodies all emit more red light than the coolest body.
Credit: IAU OAE/Niall Deacon

License: CC-BY-4.0 Creative Commons 저작자표시 4.0 국제 (CC BY 4.0) icons


Three curves with radiation on the y-axis & wavelength on the x-axis. The cooler curves have redder & lower peaks

Blackbody Radiation - UV Catastrophe

Caption: The curves of emitted radiation from blackbodies of different temperatures. The x-axis shows wavelength and the y-axis shows the amount of energy emitted every second by a square meter of the surface of that blackbody at each wavelength. The hotter the body, the shorter the wavelength and the bluer the light it emits its maximum amount of energy at. Despite the coolest body in this plot peaking in red light, the other hotter bodies all emit more red light than the coolest body. The dotted line shows the emitted radiation predicted by classical theory prior to modern quantum mechanics. This prediction tends to infinity at shorter wavelengths for any blackbody temperature above zero and was dubbed the ‘ultraviolet catastrophe’.
Credit: IAU OAE/Niall Deacon

License: CC-BY-4.0 Creative Commons 저작자표시 4.0 국제 (CC BY 4.0) icons

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