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Здравствуйте! Прошу помощи в следующем вопросе: 1. Какое наименьшее число штрихов на 1 м должна содержать дифракционная решетка, чтобы в спектре третьего порядка можно было видеть раздельно две желтые линии.(λ = 560 нм). 2. На боковую грань очень тонкого стеклянного клина нормально падает монохроматический свет с длиной волны λ = 0,7 мкм. Чему равен угол между гранями клина, если расстояние между темными интерференционными полосами в отраженном свете равно 0,4 мм. 3. Угол между плоскостями поляризации двух призм Николя равен 30°. Во сколько раз уменьшится интенсивность света, прошедшего через Николи, если этот угол сделать равным 60°? Поглощение света в Николях не учитывать.
Согласно правилам портала (ознакомьтесь, пожалуйста) не следует задавать несколько не связанных друг с другом вопросов в одной консультации. На первый раз устное порицание от лица администрации На будущее - старайтесь придерживаться установленных правил. С уважением K.S.
2. На боковую грань очень тонкого стеклянного клина нормально падает монохроматический свет с длиной волны ? = 0,7 мкм. Чему равен угол между гранями клина, если расстояние между темными интерференционными полосами в отраженном свете равно 0,4 мм.
Дано: -- показатель преломления материала клина; м -- длина волны монохроматического света, падающего нормально на клин; м -- расстояние между соседними тёмными полосами в отражённом свете.
Решение
Рисунок к задаче находится в прикреплённом файле. Запишем условие минимумов (тёмных полос) -го и -го порядков в отражённом свете:
где и -- толщина клина в месте тёмной полосы, соответствующей номерам и -- потеря полуволны, обусловленная отражением от оптически более плотной среды. Вычитая из выражения (2) выражение (1) и разделив правую и левую части полученного уравнения на получим
Ответ:
Литература Трофимова Т. И. Курс физики. Задачи и решения: учеб. пособие для учреждений высш. проф. образования / Т. И. Трофимова, А. В. Фирсов. -- М.: Издательский центр "Академия", 2011. -- 592 с.
Какое наименьшее число штрихов на 1 м должна содержать дифракционная решетка, чтобы в спектре третьего порядка можно было видеть раздельно две желтые линии.(λ = 560 нм).
Уточнила формулировку задачи. Вторая линия равна λ=562 нм.
Исходите, пожалуйста, из принципа "одно задание -- одна консультация". Решение второй задачи я Вам предложил. Если Вы хотите, чтобы Вам решили остальные две задачи, то или подождите, пока это сделают эксперты раздела, или создайте две новые консультации.
Об авторе:
Facta loquuntur.
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На будущее - старайтесь придерживаться установленных правил.
Анастасия 
-- показатель преломления материала клина; 
м -- длина волны монохроматического света, падающего нормально на клин; 
м -- расстояние между соседними тёмными полосами в отражённом свете.
-го и 
-го порядков в отражённом свете:
и 
-- толщина клина в месте тёмной полосы, соответствующей номерам 
-- потеря полуволны, обусловленная отражением от оптически более плотной среды. Вычитая из выражения (2) выражение (1) и разделив правую и левую части полученного уравнения на 
получим
Гордиенко Андрей Владимирович