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Консультация № 194176
14.12.2018, 12:25
0.00 руб.
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
На дифракционную решетку, имеющую 50 штрихов на 1 мм, падает нормально параллельный пучок белого света. Какова разность углов отклонения конца первого и начала второго спектров? Длины крайних красных и крайних фиолетовых волн принять равными 760 нм и 400 нм.
Заранее благодарен Вам!
На дифракционную решетку, имеющую 50 штрихов на 1 мм, падает нормально параллельный пучок белого света. Какова разность углов отклонения конца первого и начала второго спектров? Длины крайних красных и крайних фиолетовых волн принять равными 760 нм и 400 нм.
Заранее благодарен Вам!
Обсуждение
19.12.2018, 03:00
общий
это ответ
Здравствуйте, Megaladon!
Для света с длиной волны [$955$], падающего нормально на дифракционную решётку с периодом d, положение m-го главного максимума определяется соотношением
В данном случае d = 1/50 мм = 20000 нм и для конца первого спектра (m=1, [$955$]=760 нм) имеем
а для начала второго спектра (m=2, [$955$]=400 нм)
Таким образом, искомая разность углов составит примерно
Для света с длиной волны [$955$], падающего нормально на дифракционную решётку с периодом d, положение m-го главного максимума определяется соотношением
В данном случае d = 1/50 мм = 20000 нм и для конца первого спектра (m=1, [$955$]=760 нм) имеем
а для начала второго спектра (m=2, [$955$]=400 нм)
Таким образом, искомая разность углов составит примерно
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