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Консультация № 194405
12.01.2019, 17:02
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1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Электрон с энергией Е = 10 эВ падает на потенциальный барьер. Определить высоту U барьера, при которой показатель преломления n волн де Бройля и коэффициент отражения численно совпадают. Сделать рисунок.
Электрон с энергией Е = 10 эВ падает на потенциальный барьер. Определить высоту U барьера, при которой показатель преломления n волн де Бройля и коэффициент отражения численно совпадают. Сделать рисунок.
Обсуждение
17.01.2019, 13:48
общий
это ответ
Здравствуйте, dar777!
При падении частицы с энергией Е на потенциальный барьер высоты U показатель преломления волны де Бройля равен
а коэффициент отражения определяется выражением
Приравнивая n и R, получаем
или
Равенство имеет место при n [$8776$] 0.3 (более точное значение n [$8776$] 0.2956). Тогда
При падении частицы с энергией Е на потенциальный барьер высоты U показатель преломления волны де Бройля равен
а коэффициент отражения определяется выражением
Приравнивая n и R, получаем
или
Равенство имеет место при n [$8776$] 0.3 (более точное значение n [$8776$] 0.2956). Тогда
5
Спасибо за отличное решение!
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