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на поверхность метала падают фотоны с энергией 3、5 еВ какая максимальная кинетическая энергия фотоэлектронов если работа выхода электрона с метала 1、5еВ
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Предмет:
Физика -
Автор:
tabithasweeney - 5 лет назад
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Ответы 1
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Формула Эйнштейна для фотоэффекта:Eф=Авыхода +Екинетич.Е кинетич.=Еф-Авых.=3,5эВ-1,5эВ=2эВ =2*1,6*10^(-19)=3,2 *10^(-19) Дж.
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Автор:
montywoodard - 5 лет назад
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Прочитайте приведённый ниже текст. Преобразуйте слова, напечатанные заглавными буквами так, чтобы они грамматически соответствовали содержанию текста. Заполните пропуски полученными словами. Каждый пропуск соответствует отдельному заданию. I come from England but now I live permanently in Québec, Canada. When my parents ________BRING____brought______ me to Canada, I was fifteen. It was the winter and I ________IMPRESS___impressed_______ by the amount of snow there. I asked my new friends what they usually ________Did_________ for entertainment in such a cold climate. Their answer was simple, “In winter _________CHILDren_________ and adults go skiing and skating.” Before arriving in Canada I had never tried skating and my Canadian ice experience was really painful. To start with, it took _________I_________ half an hour to put on the skates. I _________didNT/KNOW_________ how to move so my new friends showed me some basic techniques. However, when I was left alone on the ice, I _________FALL___autumn______ over immediately. When I opened my eyes, my new friends were standing around. They weren’t laughing, they looked worried. “Are you OK?” they asked. “Fine,” I said, “I wish I ________CAN__________ skate as easily as you do.” “You definitely will,” they smiled. And they were right. By the end of my _________ONE___first______ winter in Canada, I felt confident on the ice. More than that, I found out that skating was are exciting activity! I unexpectedly met my old friend Natalie at a metro station in Paris. I recognised her at once though we hadn’t seen each other for ten years. Now she works as a ________REPORTer__________ for Le Figaro newspaper. Our _________FRIENDship_________ began when we were at school. After school, Natalie left Britain. French was her favourite subject and she went to university in Paris. Now she is a very _________Successful_________ journalist. Her life is busy and exciting. I was _________LUCKy________ that she managed to find some time for me. Natalie made my visit to Paris _________anFORGETTABLE________. She took me to the most interesting places in the city. In the evening we watched a performance at The Grand Opera House. It is one of the most ________FAMEous________ Opera Houses in the world.
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