## anonymous 3 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. anonymous

yeah i know him!!

2. anonymous

he used to answer my questions in mathematics!!!

3. anonymous

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. anonymous

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

5. anonymous

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

6. anonymous

i mean, "2" variables

7. anonymous

|dw:1368205913562:dw|

8. anonymous

what is the formula for calculating their separation ?

9. anonymous

@electrokid ??

10. anonymous

use the thin lens equation for each of the lenses.

11. anonymous

what equations do you get?

12. anonymous

what are the equations ?? how get them??

13. anonymous

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

14. anonymous

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

15. anonymous

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

16. anonymous

you'd find it on the first post.

17. anonymous

what is x ?

18. anonymous

is it di ??

19. anonymous

hello u there??

20. anonymous

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

21. anonymous

i am waiting for ur reply ??

22. anonymous

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

23. anonymous

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

24. anonymous

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