Предмет: Физика, автор: 2045515765

Угол падения луча равен альфа=75°. Угол преломления равен гамма=50°. Определить показатель преломления вещества n. Помогите пожалуйста.

Ответы

Автор ответа: Regent1828
3

 \displaystyle \frac{sin\alpha}{sin\gamma}=n_{1,2}\\ \\n_{1,2}= \frac{sin75}{sin50}=\frac{0,966}{0,766}=1,26


Данный показатель преломления соответствует соляной кислоте.

Похожие вопросы
Предмет: Английский язык, автор: sayazhas17032010
Read the text and choose a, b or c.
1. Covent Garden is
a) mainly popular with tourists. b) mainly popular with Londoners. c) popular with everybody.
2. Performers have to
a) pay before they can perform.​b) pass a test and pay. c) pass a test.
3. The people in the audience
a) decide what to pay. b) don’t pay anything. c) all pay the same.
4. George
a) studies circus skills. b) is touring Britain. c) usually performs in London.
5. He usually
a) starts his show with a big audience. b) starts his show with no audience.
c) tries to get a crowd before he starts a show.
6. Chantelle plays at Covent Garden because
a) she wants to. b) she hasn’t got a job. c) her orchestra plays there.


Lexical-grammar test
1. I … anything since breakfast.
A) didn’t eat B) haven’t eaten C) haven’t ate
2. … they watching the parade this afternoon?
A) was B) did​​C) were ​​
3. … an accident?
A) He has had B) Had he C) Has he had
4. Tom … reading at 3:00 today.
A) didn’t B) wasn’t ​​C) weren’t
5. My parent were sitting in the garden while we … a DVD.
A) was watching B) were watching C) watched​​
6. … ridden a camel?
A) You have ever B) Did you ever C) Have you ever ​​
7. She has … some amazing photos.
A) taken B) took ​C) takes
8. David was taking photos at the party … everyone else was dancing.
A) then B) while C) so
9. What did you … for dinner yesterday?
A) eats B) ate C) eat
10. Dana … the dog at the moment.
A) is walking B) walks C) are walking
11. Tina is very polite. She’s … rude to people.
A) always ​B) never ​C) often
12. They … a long time at the museum.
A) didn’t spend​​B) didn’t spent C) not spent
13. I … what to say!
A) didn’t know ​B) not know ​C) didn’t knew
14. I … TV every evening.
A) watches ​B) watch ​C) am watching