Посмотреть видеофильм «Острова Физики. Город Света Преломление света» https://youtu.be/fmOv75OVWdQ
ответьте письменно в рабочей тетради на вопросы:
1) Что такое преломление света?
2) Что такое угол падения и преломления?
3) Постройте световой луч при переходе из воздуха в воду (воздух→вода), т.е из менее плотной среды в более плотную. Обозначьте углы и напишите вывод.
4) Что произойдет, если луч света будет падать прямо, вниз (перпендикулярно)?
5) Постройте световой луч при переходе из воды в воздух (вода→воздух), т.е из более плотной среды в менее плотную. Обозначьте углы и напишите вывод.
6) Начертите и опишите, как происходит преломление светового луча в стекле.
Nowadays people have started to realize that good health is very important, much more important than wealth. To be in good health people must follow a healthy life style, to do things that will help keep a healthy body and mind, to feel fit.There are several ways to do it. The state of your body depends on how much time you spend doing sports. At least everybody must do morning exercises every day. The healthiest kinds of sports are swimming, running and cycling. Healthy food is also a very important factor. The daily menu should include meat, fruit and vegetables, milk product, which are rich in vitamins, fat, proteins and etc. On the other hand modern diets are very popular especially among women. Diets may be harmful, if they are used in the wrong way. To be healthy, people should get rid of their bad habits. It’s necessary to stop smoking and drinking much. Everyone should remember that cigarettes, alcohol and drugs destroy both body and brain. In addition it is recommended to watch TV less, avoid anxiety and observe daily routine. )
1)Good health is very significant.
2)All diets are useful and healthy.
3)It is recommended to do yoga to be in good health.
4)Alcohol and cigarettes influence only on body.
5)It is important to get rid of bad habits in order to keep a healthy body and mind.
Объяснение: