光子の記事

Dependency between the rest mass and E, given in 4-momentum (p0, p1) coordinates, where p0c = E

相対論における質量の定義不変質量と相対論的質量の違い

相対性理論不変質量相対論的質量静止質量

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Continuous spectrum of an incandescent lamp (mid) and discrete spectrum lines of a fluorescent lamp (bottom)

スペクトル線光の指紋で読み解く物質の正体と宇宙の物理

スペクトル線分光法吸収線放出線

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An overview of absorption of electromagnetic radiation. This example shows the general principle using visible light as a specific example. A white light source—emitting light of multiple wavelengths—is focused on a sample (the pairs of complementary colors are indicated by the yellow dotted lines). Upon striking the sample, photons that match the energy gap of the molecules present (green light in this example) are absorbed, exciting the molecules. Other photons are scattered (not shown here) or transmitted unaffected; if the radiation is in the visible region (400–700 nm), the transmitted light appears as the complementary color (here red). By recording the attenuation of light for various wavelengths, an absorption spectrum can be obtained.

電磁波吸収のメカニズムと科学的応用

電磁波吸収光子減衰吸収係数

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