Шаровой слой

Шаровой слой
Шар пересеченный двумя параллельными плоскостями

Шаровой слой — часть шара, ограниченная двумя параллельными плоскостями, пересекающими шар[1].

Связанные определения

  • Основания шарового слоя — это сечения шара, образовавшиеся в результате пересечения шара двумя параллельными плоскостями.
  • Высота шарового слоя — это расстояние между основаниями слоя.

Свойства

  • Объём шарового слоя можно найти как разность объёма двух шаровых сегментов:
        
    где  — объём шарового слоя,  — высота большего шарового сегмента,  — высота меньшего шарового сегмента,  — радиус шара.
  • Площадь сферической части поверхности шарового слоя (так называемый сферический пояс) зависит только от высоты слоя и радиуса шара[2]:
где  — площадь сферического пояса,  — высота шарового слоя,  — радиус шара.

Вариации и обобщения

  • В физике под шаровым слоем часто понимают слой, ограниченный сферами радиуса и , для маленького . Объем шарового слоя в этом случае с точностью до O равен .

См. также

Примечания

  1. Мантуров О. В. и др. Словарь математических терминов. — М.: Просвещение, 1965. — С. 512.
  2. Математический энциклопедический словарь / Гл. ред. Ю. В. Прохоров. — М.: Советская энциклопедия, 1988. — С. 638.

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