Last Updated：2025/11/28
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We used a light mill—an airtight glass bulb containing a partial vacuum and vanes mounted on a spindle—to measure the lamp's electromagnetic radiation intensity quantitatively.
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We used a light mill—an airtight glass bulb containing a partial vacuum and vanes mounted on a spindle—to measure the lamp's electromagnetic radiation intensity quantitatively.
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Related words
light mill
Noun
Japanese Meaning
光にさらされると羽根が回転し、その回転速度から電磁放射（光の強さ）の定量的な測定が可能になる、部分的に真空状態が保持された気密なガラス容器に搭載された装置
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