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Консультация № 200587
06.04.2021, 22:09
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1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Какое наименьшее число штрихов на 1 м должна содержать дифракционная решетка, чтобы в спектре третьего порядка можно было видеть раздельно две желтые линии(λ1= 560 нм,λ2=562 нм).
Какое наименьшее число штрихов на 1 м должна содержать дифракционная решетка, чтобы в спектре третьего порядка можно было видеть раздельно две желтые линии(λ1= 560 нм,λ2=562 нм).
Обсуждение
07.04.2021, 10:14
общий
это ответ
Здравствуйте, Анастасия!
Предлагаю Вам следующее решение задачи.
Дано:
нм, 
нм -- длины волн света, падающего на дифракционную решётку.
Определить:
-- наименьшее число штрихов решётки на единицу длины, соответствующее разрешению линий спектра порядка 
Спектральные линии будут видны раздельно (разрешены), если минимум одной будет попадать на максимум другой. В этом случае для разрешающей способности
дифракционной решётки длиной 
м выполняется условие
откуда получим
то есть
Ответ:
Литература
Оптика. Решение задач: учебное пособие / Л. И. Буров [и др.]; под общ. ред. Л. И. Бурова. -- Минск, Вышэйшая школа, 2018. -- 334 с.
Предлагаю Вам следующее решение задачи.
Дано:
нм, нм -- длины волн света, падающего на дифракционную решётку.Определить:
-- наименьшее число штрихов решётки на единицу длины, соответствующее разрешению линий спектра порядка Решение
Спектральные линии будут видны раздельно (разрешены), если минимум одной будет попадать на максимум другой. В этом случае для разрешающей способности
дифракционной решётки длиной м выполняется условиеоткуда получим
то есть
Ответ:
Литература
Оптика. Решение задач: учебное пособие / Л. И. Буров [и др.]; под общ. ред. Л. И. Бурова. -- Минск, Вышэйшая школа, 2018. -- 334 с.
5
Спасибо!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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