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Консультация № 195103
01.04.2019, 09:02
0.00 руб.
0
3
2
Здравствуйте! У меня возникли сложности с таким вопросом:
Вдоль главной оптической оси собирающей линзы разместили
тонкий стержень. Расстояние от линзы до ближайшего торца стержня
равно a1, а до дальнего конца, соответственно a2. Длина действительного изображения стержня
L = a2 - a1
Вычислите фокусное расстояние f
линзы?
Вдоль главной оптической оси собирающей линзы разместили
тонкий стержень. Расстояние от линзы до ближайшего торца стержня
равно a1, а до дальнего конца, соответственно a2. Длина действительного изображения стержня
L = a2 - a1
Вычислите фокусное расстояние f
линзы?
Обсуждение
02.04.2019, 21:03
общий
Адресаты:
Сообщите, пожалуйста, откуда Вы взяли эту задачу. 
Об авторе:
Facta loquuntur.
Facta loquuntur.
04.04.2019, 10:17
общий
это ответ
Здравствуйте, alexs00035@gmail.com!
Если я правильно понимаю, то из формул (11.1) и (11.5) здесь при имеющем место продольном увеличении линзы, равном 1, получим 1=F2/((a1-F)(a2-F)), (a1-F)(a2-F)=F2, a1a2-Fa2-Fa1+F2=F2, a1a2-F(a1+a2)=0, F=a1a2/(a1+a2).
Если я правильно понимаю, то из формул (11.1) и (11.5) здесь при имеющем место продольном увеличении линзы, равном 1, получим 1=F2/((a1-F)(a2-F)), (a1-F)(a2-F)=F2, a1a2-Fa2-Fa1+F2=F2, a1a2-F(a1+a2)=0, F=a1a2/(a1+a2).
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
Форма ответа
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