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Консультация № 191136
12.06.2017, 21:18
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Здравствуйте! Прошу помощи в следующем вопросе:
На главной оптической оси рассеивающей линзы с фокусным рас- стоянием F находится точечный источник света S . Найдите расстояние x от источника до ближайшего фокуса линзы, если оно равно рас- стоянию от этого фокуса до изображения источника.
На главной оптической оси рассеивающей линзы с фокусным рас- стоянием F находится точечный источник света S . Найдите расстояние x от источника до ближайшего фокуса линзы, если оно равно рас- стоянию от этого фокуса до изображения источника.
Обсуждение
16.06.2017, 10:22
общий
это ответ
Здравствуйте, komprantshow!
В рассеивающей линзе изображение точечного источника света будет мнимым и расположенным между линзой и её фокусом со стороны источника света. Выполнив соответствующие построения, можно убедиться, что источник света и его изображение находятся по разные стороны от фокуса. При этом
и, согласно формуле линзы,
откуда
Надеюсь, Вы сумеете воспроизвести опущенное мной решение уравнения второй степени самостоятельно.
В рассеивающей линзе изображение точечного источника света будет мнимым и расположенным между линзой и её фокусом со стороны источника света. Выполнив соответствующие построения, можно убедиться, что источник света и его изображение находятся по разные стороны от фокуса. При этом
и, согласно формуле линзы,
откуда
Надеюсь, Вы сумеете воспроизвести опущенное мной решение уравнения второй степени самостоятельно.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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