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Emission Spectra02:39

Emission Spectra

When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...

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Updated: Jul 1, 2026

Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

スーパーノヴァ1987A!とは

S E Woosley, M M Phillips

    Science (New York, N.Y.)
    |May 6, 1988
    PubMed
    まとめ
    この要約は機械生成です。

    近400年で最も明るい1987年の超新星は,巨大な星の死について前例のない洞察を提供しました. さまざまな検出器からの観測は,多くの理論を裏付けましたが,この宇宙イベントに関する魅力的な驚きも明らかにしました.

    さらに関連する動画

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation
    10:52

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation

    Published on: February 4, 2017

    An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions
    07:48

    An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

    Published on: June 18, 2020

    関連する実験動画

    Last Updated: Jul 1, 2026

    Bringing the Visible Universe into Focus with Robo-AO
    10:35

    Bringing the Visible Universe into Focus with Robo-AO

    Published on: February 12, 2013

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation
    10:52

    Direct Imaging of Laser-driven Ultrafast Molecular Rotation

    Published on: February 4, 2017

    An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions
    07:48

    An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

    Published on: June 18, 2020

    科学分野:

    • 天文学と天体物理学について
    • コスミック・エクスプロージョン (宇宙の爆発)
    • 恒星の進化について

    背景:

    • 近400年で最も明るい超新星,SN 1987Aは,大マゲラン雲の中で発生しました.
    • その相対的な近さ (16万光年) は,詳細で新しい観測を可能にしました.
    • 超新星は,巨大な星の暴力的な死を表し,宇宙の重要なプロセスです.

    研究 の 目的:

    • SN 1987A.が提供するユニークな観測機会を活用する.
    • 巨大な恒星の死を支配する物理学の理解を深めること.
    • 観測データと超新星理論モデルを比較する.

    主な方法:

    • 宇宙,地上探知機,気球,航空機からの多波長観測.
    • 地下深くにある検出器を使って中性子の検出.
    • エネルギー放出と組成を理解するために,光曲線とスペクトルデータの分析.

    主要な成果:

    • 超新星メカニズムに関する多くの理論的期待が確認された.
    • ニュートリノの検出は,核の崩壊過程の直接的な証拠を提供しました.
    • 予期せぬ観測データは,既存のいくつかのモデルに異議を唱え,新しい現象を強調した.

    結論:

    • SN 1987Aは,恒星の死と超新星物理学の理解を大幅に前進させました.
    • このイベントは,マルチメッセンジャー天文学 (光とニュートリノ) の重要性を強調した.
    • SN 1987Aからの驚きは,天体物理学における理論的および観測的研究を継続的に推進しています.