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Консультация № 195261
16.04.2019, 05:21
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Здравствуйте! У меня возникли сложности с таким вопросом:
На дифракционную решётку нормально к её поверхности падает параллельный пучок света с длиной волны λ. Помещённая вблизи решётки линза проецирует дифракционную картину на экран, удаленный от линзы на расстояние L=1м. Расстояние между двумя максимумами интенсивности первого порядка на экране равно l=20см Постоянная решётки − d=5мкм Число штрихов решётки на единицу длины − n. Максимальный порядок спектра – mmax. Число максимумов, которое при этом даёт решётка − N. Угол дифракции первого порядка − ϕ1 найдите недостающие величины.
На дифракционную решётку нормально к её поверхности падает параллельный пучок света с длиной волны λ. Помещённая вблизи решётки линза проецирует дифракционную картину на экран, удаленный от линзы на расстояние L=1м. Расстояние между двумя максимумами интенсивности первого порядка на экране равно l=20см Постоянная решётки − d=5мкм Число штрихов решётки на единицу длины − n. Максимальный порядок спектра – mmax. Число максимумов, которое при этом даёт решётка − N. Угол дифракции первого порядка − ϕ1 найдите недостающие величины.
Обсуждение
19.04.2019, 08:55
общий
это ответ
Здравствуйте, haibrahmanova.elmira!
Пусть
м -- расстояние между линзой, установленной вблизи решётки, и экраном, на который линза проецирует дифракционную картину;
см
м -- расстояние между двумя максимумами интенсивности первого порядка 
на экране;
мкм
м -- постоянная дифракционной решётки.
Воспользуемся рисунком ниже и решением задачи отсюда (прикреплённый файл).
Тогда, рассуждая аналогично, получим
(м)
мкм -- длина волны света, падающего на дифракционную решётку нормально к её поверхности;
(м-1) -- число штрихов решётки на единицу длины;
-- максимальный порядок спектра (прямоугольные скобки означают, что берётся целая часть полученного числа);
-- число максимумов, которые даёт решётка;
-- угол дифракции первого порядка.
Пусть
м -- расстояние между линзой, установленной вблизи решётки, и экраном, на который линза проецирует дифракционную картину; см м -- расстояние между двумя максимумами интенсивности первого порядка на экране; мкм м -- постоянная дифракционной решётки.Воспользуемся рисунком ниже и решением задачи отсюда (прикреплённый файл).
Тогда, рассуждая аналогично, получим
(м) мкм -- длина волны света, падающего на дифракционную решётку нормально к её поверхности; (м-1) -- число штрихов решётки на единицу длины; -- максимальный порядок спектра (прямоугольные скобки означают, что берётся целая часть полученного числа); -- число максимумов, которые даёт решётка; -- угол дифракции первого порядка.
Прикрепленные файлы:
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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