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Консультация № 192194
21.12.2017, 16:09
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
На экран с круглым отверстием радиусом 1,2 мм падает параллельный пучок
монохроматического света с длиной волны 0,6 мкм. Определить максимальное расстояние от отверстия на его оси, где еще можно наблюдать темное пятно.
На экран с круглым отверстием радиусом 1,2 мм падает параллельный пучок
монохроматического света с длиной волны 0,6 мкм. Определить максимальное расстояние от отверстия на его оси, где еще можно наблюдать темное пятно.
Обсуждение
21.12.2017, 22:27
общий
Адресаты:
тоже про расстояние как-то непонятно... 
что за расстояние? 
что за расстояние?
Об авторе:
С уважением
shvetski
С уважением
shvetski
21.12.2017, 23:05
общий
это ответ
Здравствуйте, stounsound1996!
Условие центрального минимума - разность хода до центра и краёв отверстия равна целому числу волн
[$916$]l=k[$955$]
учитывая, что на достаточно больших расстояниях [$916$]l/r[$8776$]r/x,
находим расстояние x=r2/k[$955$]
наибольшим оно будет при k=1, то есть
x=r2/[$955$]=(1,2[$183$]10-3м)2/(0,6[$183$]10-6м)=2,4 м
Условие центрального минимума - разность хода до центра и краёв отверстия равна целому числу волн
[$916$]l=k[$955$]
учитывая, что на достаточно больших расстояниях [$916$]l/r[$8776$]r/x,
находим расстояние x=r2/k[$955$]
наибольшим оно будет при k=1, то есть
x=r2/[$955$]=(1,2[$183$]10-3м)2/(0,6[$183$]10-6м)=2,4 м
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