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Консультация № 185221
19.01.2012, 21:49
61.88 руб.
19.01.2012, 22:59
0
3
2
Здравствуйте Уважаемые Эксперты! Прошу помощи в следующем вопросе:
На рис.1. Изображена часть установки для получения колец Ньютона. Какое из нижеприведенных выражений дает оптическую разность хода для лучей, интерферирующих в проходящем свете? Между линзой и пластинкой вакуум (воздух).
1.2b+(2[$955$]/2)
2. 2b+([$955$]/2)
3. b+([$955$]/2)
4. b-([$955$]/2)
5. 2b-([$955$]/2)
рис.1. можно скачать по ссылке http://narod.ru/disk/35329512001/%D1%80%D0%B8%D1%81%201.jpg.html
На рис.1. Изображена часть установки для получения колец Ньютона. Какое из нижеприведенных выражений дает оптическую разность хода для лучей, интерферирующих в проходящем свете? Между линзой и пластинкой вакуум (воздух).
1.2b+(2[$955$]/2)
2. 2b+([$955$]/2)
3. b+([$955$]/2)
4. b-([$955$]/2)
5. 2b-([$955$]/2)
рис.1. можно скачать по ссылке http://narod.ru/disk/35329512001/%D1%80%D0%B8%D1%81%201.jpg.html
Обсуждение
19.01.2012, 23:07
общий
это ответ
Здравствуйте, Цыгуро Олег Петрович!
Рассмотрим 2 проходящих луча:
1) луч проходит без отражений
2) луч достигает плоской пластины вместе с первым, отражается от пластины (с потерей полуволны), падает обратно на линзу (пройдя расстояние b), отражается от неё (с потерей полуволны), снова падает на плоскую пластину (пройдя расстояние b) и дальше идёт вместе с первым лучом.
Итого второй луч дополнительно (по сравнению с первым) 2 раза проходит расстояние b и дважды отражается от стекла с потерей полуволны.
Итого разность хода [$916$]l=2b+2[$955$]/2=2b+[$955$]
Рассмотрим 2 проходящих луча:
1) луч проходит без отражений
2) луч достигает плоской пластины вместе с первым, отражается от пластины (с потерей полуволны), падает обратно на линзу (пройдя расстояние b), отражается от неё (с потерей полуволны), снова падает на плоскую пластину (пройдя расстояние b) и дальше идёт вместе с первым лучом.
Итого второй луч дополнительно (по сравнению с первым) 2 раза проходит расстояние b и дважды отражается от стекла с потерей полуволны.
Итого разность хода [$916$]l=2b+2[$955$]/2=2b+[$955$]
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