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Консультация № 200864
18.05.2021, 22:35
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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 ?=449,4 нм. Помещённая вблизи решётки линза проецирует дифракционную картину на экран, удаленный от линзы на расстояние L=2 м. Расстояние между двумя максимумами интенсивности первого порядка на экране равно l. Постоянная решётки ? d=5 мкм. Число штрихов решётки на единицу длины ? n. Максимальный порядок спектра – mmax. Число максимумов, которое при этом даёт решётка ? N. Угол дифракции первого порядка ? ?1 найдите недостающие величины.
На дифракционную решётку нормально к её поверхности падает параллельный пучок света с длиной волны ?=449,4 нм. Помещённая вблизи решётки линза проецирует дифракционную картину на экран, удаленный от линзы на расстояние L=2 м. Расстояние между двумя максимумами интенсивности первого порядка на экране равно l. Постоянная решётки ? d=5 мкм. Число штрихов решётки на единицу длины ? n. Максимальный порядок спектра – mmax. Число максимумов, которое при этом даёт решётка ? N. Угол дифракции первого порядка ? ?1 найдите недостающие величины.
Обсуждение
20.05.2021, 21:21
общий
это ответ
Здравствуйте, mila.derenckowa!
Предлагаю Вам следующее решение задачи.
Дано:
м -- длина волны параллельного пучка света, падающего нормально на поверхность дифракционной решётки; 
м -- расстояние между линзой, которая проецирует дифракционную картину на экран, и экраном; 
м -- постоянная решётки.
Определить:
-- расстояние между двумя максимумами интенсивности первого порядка; 
-- число штрихов решётки на единицу длины; 
-- максимальный порядок спектра; 
-- число максимумов, которые даёт решётка; 
-- угол дифракции первого порядка.
В соответствии с известными формулами [1, с. 343-344] имеем
(м);
Ответ:
м;
Литература
1. Чертов А. Г., Воробьёв А. А. Задачник по физике. -- М.: Высш. шк., 1988.
Предлагаю Вам следующее решение задачи.
Дано:
м -- длина волны параллельного пучка света, падающего нормально на поверхность дифракционной решётки; м -- расстояние между линзой, которая проецирует дифракционную картину на экран, и экраном; м -- постоянная решётки. Определить:
-- расстояние между двумя максимумами интенсивности первого порядка; -- число штрихов решётки на единицу длины; -- максимальный порядок спектра; -- число максимумов, которые даёт решётка; -- угол дифракции первого порядка.Решение
В соответствии с известными формулами [1, с. 343-344] имеем
(м);Ответ:
м; Литература
1. Чертов А. Г., Воробьёв А. А. Задачник по физике. -- М.: Высш. шк., 1988.
5
Благодарю вас за помощь!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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