Jisho

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こうそく 光束
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Noun
1. luminous flux​Physics
Noun
2. pencil (of light); beam​
  • しろいろ白色
  • の
  • こうそく光束
  • は
  • プリズム
  • によって
  • さまざま様々な
  • いろ色
  • の
  • こうせん光線
  • に
  • ぶんり分離
  • される
    • 。
A beam of white light is split by a prism into rays of various colors.
Wikipedia definition
3. Luminous flux​In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of light emitted, in that luminous flux is adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light.
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