koli123able 2 years ago A compound microscope has an objective and an eye-piece of focal length 1cm and 5cm respectively. The object is located at a distance of 1.05cm close from the objective and form an image 4.17cm close to eye-piece . Find the separation of the lenses and the magnifying power of the microscope (d=25cm)

1. koli123able

yeah i know him!!

2. koli123able

he used to answer my questions in mathematics!!!

3. electrokid

solve this in two steps.|dw:1368205614311:dw| apply the thin lens equation one for each lens ${1\over f}={1\over d_i}+{1\over d_o}$

4. electrokid

the given info: do for the first lens di for the last lens

5. electrokid

|dw:1368205846491:dw| assume the lenses are separated by a distance of "x" then you get two simultaneous equations and one variable

6. electrokid

i mean, "2" variables

7. electrokid

|dw:1368205913562:dw|

8. koli123able

what is the formula for calculating their separation ?

9. koli123able

@electrokid ??

10. electrokid

use the thin lens equation for each of the lenses.

11. electrokid

what equations do you get?

12. koli123able

what are the equations ?? how get them??

13. electrokid

I wrote the formulae above. you should also find them in your text.

14. koli123able

why there are 2 formulas being used ?? and how??

15. electrokid

only one formula // but use it on each lens.. there are two lenses

16. electrokid

you'd find it on the first post.

17. koli123able

what is x ?

18. koli123able

is it di ??

19. koli123able

hello u there??

20. koli123able

helooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

21. koli123able

i am waiting for ur reply ??

22. koli123able

i have to go to sleep ....hello u there??

23. electrokid

"x" = assumed distance between the lenses -> one of the things to calculate

24. koli123able

plz i cant understand ......plz tell me the solution