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Консультация № 200602
09.04.2021, 13:29
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос: на дифракционную решётку, содержащую n=400 штрихов на миллиметр, падает нормально монохроматический свет (л=0,6 мкм). найти общее число дифракционных максимумов, которые даёт эта решётка. определить угол дифракции f, соответствующий последнему максимуму.
Обсуждение
11.04.2021, 09:22
общий
это ответ
Здравствуйте, vladislav.makeev88!
Предлагаю Вам следующее решение задачи.
Дано:
-- число штрихов дифракционной решётки на длине 
м; 
м -- длина волны монохроматического света, падающего нормально на дифракционную решётку.
Определить:
-- общее число дифракционных максимумов, которые даёт эта решётка; 
-- угол дифракции, соответствующий последнему максимуму.
Соотношение между постоянной
дифракционной решётки, длиной волны 
монохроматического света, падающего на решётку, углом 
между нормалью к решётке и направлением дифрагированных волн и номером 
главного максимума имеет вид
Чтобы рассчитать номер
последнего максимума, примем 
и получим
Значит,
поскольку по обе стороны от центрального максимума, порядок которого принимают равным нулю, находятся по четыре максимума. При этом
Ответ:
Литература
Чертов А. Г., Воробьёв А. А. Задачник по физике: Учеб. пособие для студентов втузов. -- М.: Высш. шк., 1988. -- 527 с.
Предлагаю Вам следующее решение задачи.
Дано:
-- число штрихов дифракционной решётки на длине м; м -- длина волны монохроматического света, падающего нормально на дифракционную решётку.Определить:
-- общее число дифракционных максимумов, которые даёт эта решётка; -- угол дифракции, соответствующий последнему максимуму.Решение
Соотношение между постоянной
дифракционной решётки, длиной волны монохроматического света, падающего на решётку, углом между нормалью к решётке и направлением дифрагированных волн и номером главного максимума имеет видЧтобы рассчитать номер
последнего максимума, примем и получимЗначит,
поскольку по обе стороны от центрального максимума, порядок которого принимают равным нулю, находятся по четыре максимума. При этомОтвет:
Литература
Чертов А. Г., Воробьёв А. А. Задачник по физике: Учеб. пособие для студентов втузов. -- М.: Высш. шк., 1988. -- 527 с.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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