"total internal reflection" meaning in English

{
  "forms": [
    {
      "form": "total internal reflections",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "total internal reflection (countable and uncountable, plural total internal reflections)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Optics",
          "orig": "en:Optics",
          "parents": [
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "88 12",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A phenomenon where light, instead of passing into a medium of a lower refractive index and refracting away from the normal, is completely reflected by the boundary between the two media because it approaches at an angle greater than or equal to the critical angle."
      ],
      "id": "en-total_internal_reflection-en-noun-Ref3Gfz3",
      "links": [
        [
          "optics",
          "optics"
        ],
        [
          "refractive index",
          "refractive index"
        ],
        [
          "refract",
          "refract"
        ],
        [
          "normal",
          "normal"
        ],
        [
          "critical angle",
          "critical angle"
        ]
      ],
      "raw_glosses": [
        "(optics, uncountable) A phenomenon where light, instead of passing into a medium of a lower refractive index and refracting away from the normal, is completely reflected by the boundary between the two media because it approaches at an angle greater than or equal to the critical angle."
      ],
      "related": [
        {
          "_dis1": "67 33",
          "word": "Snell's law"
        }
      ],
      "synonyms": [
        {
          "_dis1": "67 33",
          "word": "complete internal reflection"
        },
        {
          "_dis1": "67 33",
          "word": "total internal reflexion"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "engineering",
        "natural-sciences",
        "optics",
        "physical-sciences",
        "physics"
      ],
      "translations": [
        {
          "_dis1": "93 7",
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "neuter"
          ],
          "word": "całkowite wewnętrzne odbicie"
        }
      ]
    },
    {
      "categories": [],
      "glosses": [
        "An instance of this phenomenon."
      ],
      "id": "en-total_internal_reflection-en-noun-sIMh44mU",
      "raw_glosses": [
        "(countable) An instance of this phenomenon."
      ],
      "tags": [
        "countable"
      ]
    }
  ],
  "word": "total internal reflection"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English uncountable nouns",
    "Translation table header lacks gloss"
  ],
  "forms": [
    {
      "form": "total internal reflections",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "total internal reflection (countable and uncountable, plural total internal reflections)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Snell's law"
    }
  ],
  "senses": [
    {
      "categories": [
        "English uncountable nouns",
        "en:Optics"
      ],
      "glosses": [
        "A phenomenon where light, instead of passing into a medium of a lower refractive index and refracting away from the normal, is completely reflected by the boundary between the two media because it approaches at an angle greater than or equal to the critical angle."
      ],
      "links": [
        [
          "optics",
          "optics"
        ],
        [
          "refractive index",
          "refractive index"
        ],
        [
          "refract",
          "refract"
        ],
        [
          "normal",
          "normal"
        ],
        [
          "critical angle",
          "critical angle"
        ]
      ],
      "raw_glosses": [
        "(optics, uncountable) A phenomenon where light, instead of passing into a medium of a lower refractive index and refracting away from the normal, is completely reflected by the boundary between the two media because it approaches at an angle greater than or equal to the critical angle."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "engineering",
        "natural-sciences",
        "optics",
        "physical-sciences",
        "physics"
      ]
    },
    {
      "categories": [
        "English countable nouns"
      ],
      "glosses": [
        "An instance of this phenomenon."
      ],
      "raw_glosses": [
        "(countable) An instance of this phenomenon."
      ],
      "tags": [
        "countable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "complete internal reflection"
    },
    {
      "word": "total internal reflexion"
    }
  ],
  "translations": [
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "neuter"
      ],
      "word": "całkowite wewnętrzne odbicie"
    }
  ],
  "word": "total internal reflection"
}