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Консультация № 172370
20.09.2009, 13:58
0.00 руб.
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Здравствуйте,уважаемые эксперты! Помогите пожалуйста решить задачу:
Пластинку кварца толщиной d=1,5 мм поместили между параллельными николями, в результате чего плоскость поляризации монохроматического света повернулась на угол [$966$]=27[$186$]. Какой наименьшей толщины dmin следует взять пластинку, чтобы полее зрения поляриметра стола совершенно темным?
Заранее спасибо
Пластинку кварца толщиной d=1,5 мм поместили между параллельными николями, в результате чего плоскость поляризации монохроматического света повернулась на угол [$966$]=27[$186$]. Какой наименьшей толщины dmin следует взять пластинку, чтобы полее зрения поляриметра стола совершенно темным?
Заранее спасибо
Обсуждение
21.09.2009, 23:36
общий
это ответ
Здравствуйте, Ushastik1985.
Угол поворота плоскости поляризации света пропорционален длине пути светового луча в кварце: φ = αd, где α – вращательная способность кварца. При φ1 = 90° будет наблюдаться полное затмение поля зрения. Следовательно,
α = φ/d = φ1/dmin,
откуда
dmin = φ1d/φ = (90° ∙ 1,5)/27° = 5 (мм).
Ответ: 5 мм.
С уважением.
Угол поворота плоскости поляризации света пропорционален длине пути светового луча в кварце: φ = αd, где α – вращательная способность кварца. При φ1 = 90° будет наблюдаться полное затмение поля зрения. Следовательно,
α = φ/d = φ1/dmin,
откуда
dmin = φ1d/φ = (90° ∙ 1,5)/27° = 5 (мм).
Ответ: 5 мм.
С уважением.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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