Предмет: Физика, автор: kop08880

уха на плоскопараллельную стеклянную пластинку под углом 30° , а из стекла попадает в жидкость. найдите синус угла преломления света в жидкости, если ее показатель преломления n=1.25

Ответы

Автор ответа: ommg

n=sin угла падения/ sin угла преломления;
Sin уг. прел.= sin уг пад./n
Sin уг прел.=0,5*100/125=0,4

Интересные вопросы

Предмет: Математика, автор: aurfeliks

СРОЧНО. Если каждый ребенок возьмет с праздничного стола 5 пирожных, то на столе останется 5 пирожных, а если дети решат взять по 7 пирожных, то им не хватит девяти пирожных. Сколько пирожных на столе?

6 лет назад

Предмет: Английский язык, автор: dmytro14091998

Поможіть зробити тест

1. Your teacher has told you to write a story for your homework. You tell your parents.
I have to write a story.
I should write a story.
I may write a story.

2. He ... be famous. I've never heard of him.
mustn't
must
can't

3. We live in ... large block of flats.
one
a
the

4. I ... you to the fair unless you behave yourselves.
won't take
won't be taking
won't have taken

5. It's cold. I think I ... another jumper.
am putting on
will put on
put on

6. We ... phone Mary. It's her birthday today.
needn't
ought to
are able to

7. It was very dark, but he... find his way.
couldn´t
could
was able to

8. Julia ... the note I left for her by now.
will be finding
will have found
will have been found

9. I ... for two hours by 12 o'clock.
will have read
will have been reading
am reading

10. He ..................... to find a cleaning woman for a month now.
has been trying
has tried
is trying

11. Look ! You ................. coffee all over my desk !
has been spilling
spill
were spilling
have spilt

12. When Laura arrived at the restaurant, Tony .................... home.
had been gone
had gone

13. Sally is amazing. I don't know how she copes ........... her job, and her kids at the same time.
with
by
at

14. Jane became .................... as she was waiting for Tom to turn up.
impatient
easy-going
depressed
exhausted

15. I'm sure Jean wasn't really upset; those were just ................. tears.
crocodile
bull
birds
lion
butterflies

16. I really believe I ought to .......... about yesterday’s meeting.
been informed
have been informed
have informed
inform

17. “How will I know it’s your brother?”

“He ............ a green Ford.”
will have driven
will drive
will be driving
will have been driving

18. The boss put Lynn in charge of the Personnel Department, but I don’t think she’s ....... the job.
up with
in to
up to
in for

19. Dinner has been ready _______ two hours.
for
since
from
before

20. I have ................. arrangements for Mr. and Mrs. Johnson to stay at a nearby hotel.
made
put
had
done

6 лет назад

Предмет: Английский язык, автор: maria29gevorgyan

Exercise 4
Example: pen on the desk/red
There is a pen on the desk.
The pen is red.
Now you do the same.
1) cup on the table/clean 5) bottle in the refrigerator/full
2) box on the floor/large
6) book on the shelf/interesting
3) glass on the sideboard/empty 7) tie on the chair/yellow
4) knife on the plate/sharp.
8) chair in the room/comfortable

6 лет назад

Предмет: Математика, автор: revancik85

Посадили Хвойных и лиственных деревьев -70 . Ск ? - хвойных и ск ? Лиственных деревьев посадили если листенных было посажено на 20 деревьев больше чем хвойных ?

9 лет назад

Предмет: Математика, автор: vikamakarova2005

в двух четвёртых классах 55 учащихся .сколько учащихся в каждом классе,если в одном из них учащихся больше,чем в другом ,на 3 человека?

9 лет назад