"Fresnel number" meaning in English

{
  "etymology_text": "Named after the physicist Augustin-Jean Fresnel.",
  "forms": [
    {
      "form": "Fresnel numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Fresnel number (plural Fresnel numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "kind": "topical",
          "langcode": "en",
          "name": "Optics",
          "orig": "en:Optics",
          "parents": [
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "A dimensionless quantity (denoted F), such that for an electromagnetic wave passing through an aperture and hitting a screen, F=(a²)/(Lλ) where a is the characteristic size (e.g. radius) of the aperture, L is the distance of the screen from the aperture, and λ is the incident wavelength."
      ],
      "id": "en-Fresnel_number-en-noun-vHkWjuNc",
      "links": [
        [
          "optics",
          "optics"
        ],
        [
          "dimensionless quantity",
          "dimensionless quantity"
        ],
        [
          "electromagnetic wave",
          "electromagnetic wave"
        ],
        [
          "aperture",
          "aperture"
        ],
        [
          "screen",
          "screen"
        ],
        [
          "radius",
          "radius"
        ],
        [
          "incident",
          "incident"
        ],
        [
          "wavelength",
          "wavelength"
        ]
      ],
      "raw_glosses": [
        "(optics) A dimensionless quantity (denoted F), such that for an electromagnetic wave passing through an aperture and hitting a screen, F=(a²)/(Lλ) where a is the characteristic size (e.g. radius) of the aperture, L is the distance of the screen from the aperture, and λ is the incident wavelength."
      ],
      "topics": [
        "engineering",
        "natural-sciences",
        "optics",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "Augustin-Jean Fresnel",
        "Fresnel number"
      ]
    }
  ],
  "word": "Fresnel number"
}

{
  "etymology_text": "Named after the physicist Augustin-Jean Fresnel.",
  "forms": [
    {
      "form": "Fresnel numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Fresnel number (plural Fresnel numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
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        "en:Optics"
      ],
      "glosses": [
        "A dimensionless quantity (denoted F), such that for an electromagnetic wave passing through an aperture and hitting a screen, F=(a²)/(Lλ) where a is the characteristic size (e.g. radius) of the aperture, L is the distance of the screen from the aperture, and λ is the incident wavelength."
      ],
      "links": [
        [
          "optics",
          "optics"
        ],
        [
          "dimensionless quantity",
          "dimensionless quantity"
        ],
        [
          "electromagnetic wave",
          "electromagnetic wave"
        ],
        [
          "aperture",
          "aperture"
        ],
        [
          "screen",
          "screen"
        ],
        [
          "radius",
          "radius"
        ],
        [
          "incident",
          "incident"
        ],
        [
          "wavelength",
          "wavelength"
        ]
      ],
      "raw_glosses": [
        "(optics) A dimensionless quantity (denoted F), such that for an electromagnetic wave passing through an aperture and hitting a screen, F=(a²)/(Lλ) where a is the characteristic size (e.g. radius) of the aperture, L is the distance of the screen from the aperture, and λ is the incident wavelength."
      ],
      "topics": [
        "engineering",
        "natural-sciences",
        "optics",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "Augustin-Jean Fresnel",
        "Fresnel number"
      ]
    }
  ],
  "word": "Fresnel number"
}