Вопрос школьника по предмету Физика
1 какие тела изучают сплошные спектры а какие ленейчатые
Ответ учителя по предмету Физика
Линейчатый спектр излучают тела в газообразном атамарном состоянии (атомы, излучающие свет, практически не взаимодействуют друг с другом)
Сплошные спектры излучают тела в твердом и жидком состоянии, а так же очень плотные газы.
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Brian works four days a week. Sometimes he’sfree at the weekend, butusually he works on Friday and Saturday. Friday and Saturday are very busy days for Eurostar because everybody wants to go on holiday or go home for the weekend. Eurostar runs every day (but it doesn’t run on Christmas Day).
The first train to Paris leaves London at 5.25 in the morning, so Brian starts work at 4.30. In one day he does two or three journeys between London and Paris. He finishes work at 12.00 noon. Sometimes he starts late — at 4.00 p.m. — and works until 11.30 at night. Sometimes he doesn’t go home at the end of the day, he stays in Paris.
The journey
The journey takes 2 hours 15 minutes, and the train travels at 300 km/h. It doesn’t go so fast in the tunnel — it only goes at 160 km/h when it travels through the tunnel. It carries 794 passengers.
When the train is in France, Brian speaks to his controllers in French. His French is very good. He has a lot of French friends, and his son, Toby, goes to stay with them in Paris.
Brian earns £45,000 a year. In his free time he likes going out with his wife, Angela, and walking their dogs. Angela is a chef, so she works at weekends too. She has Monday free and goes walking with Brian.
He has 25 days of holiday a year. Where does he go on holiday? ‘France, of course!’ says Brian.