## AvengerVirus 3 years ago How many images will be formed if two mirrors are fitted on adjustment walls and one mirror on ceiling? a-2 b-5 c-7 d-11

1. AvengerVirus

2. omnomnom

Doesnt it depend on what angle you are looking from?

3. AvengerVirus

that is only written and i think they mean it will looks like a room |dw:1351708086154:dw|

4. AvengerVirus

i draw what i understand from the problem

5. ash2326

@AvengerVirus The figure you have dra|dw:1351708439753:dw|wn. If an object is kept between the two mirrors. Infinite no. of images will be formed.

6. AvengerVirus

but the problem say nothing about object so that i don't understand what it mean

7. omnomnom

I mean from what i am seeing i only see like 6 views.. O_O if thats even possible.. And you just confused me .. -_-

8. ash2326

I think the two mirrors are on the same wall, otherwise we'd have infinite no. of images. Figure should be like this|dw:1351708694076:dw| M1,2 ,3 are the mirrors.

9. ash2326

M1 and M3 have an angle of 90, how many images form if mirrors have an angle of 90?

10. omnomnom

Then wouldnt it have the reflection of what is on the other mirror?

11. AvengerVirus

may the angel between M1 & M2 is 90 and M3 is up can u draw that i will try

12. AvengerVirus

|dw:1351708972826:dw|

13. AvengerVirus

then the angle between each of them will be 90 could that be right ?

14. ash2326

M1 and M2 are on the same wall. There won't be any secondary images between them. Just primary images.

15. AvengerVirus

my pic has 3 walls so that could be the meaning of the problem ?

16. AvengerVirus

so in M1 and M2 we can see 3 images right ?

17. ash2326

Yeah that could be right.

18. ash2326

M1 and M2 will have two primary and one secondary. same goes for M2 and M3, M1 and M3 We'll have totally 3 primary and 3 secondary images. 6 images totally

19. omnomnom

That's not even in the options

20. ash2326

oops, then the two mirrors will be on the same wall.

21. AvengerVirus

there is formula say 360/n-1 where n is the angle but it calculate the image that comes out of two mirrors is there any one for three mirrors ?

22. 03225186213

not on same wall adjacent walls that is at 90 degree

23. AvengerVirus

yes that is right but do u have any idea how to know all the images @03225186213

24. 03225186213

if u stand in front of one mirror and see your images then there will be 5 images

25. AvengerVirus

on the mirrors that adjusted on the wall i can see 3 so u mean 2 on the ceiling's mirror ?

26. 03225186213

one u will see in front mirror 2nd u will see in side mirror and when u looks up it wiil give your 3rd image as well as two other mirrors image in which u will see your image 4th 5th

27. 03225186213

thats my idea solve it practically by going to hair saloon

28. AvengerVirus

even than i won't be able to find a ceiling mirror :)

29. ghazi

@AvengerVirus you have got three mirrors this time right? and did you get your answer?

30. AvengerVirus

not yet

31. ghazi

is it three mirror system this way? |dw:1351715664451:dw|

32. ghazi

33. AvengerVirus

|dw:1351715783712:dw|

34. ghazi

then it's 11

35. ghazi

it should be 12 but due to imposition of one image it will be 12-1=11

36. AvengerVirus

could u explain how ?

37. AvengerVirus

did u used that formula ?

38. ghazi

use the same formula for the pair of mirrors and then there will be total of 12 with one image imposed by all three, like the mirror on ceiling with one mirror at 90 degrees will give four images, similarly with other it will give 4 and the two mirror adjacent to each other will give 4 total of 12 but one less

39. AvengerVirus

but the formula say 360/90-1 and that equal 3 why u say 4

40. ghazi

oops a big mistake, it will be 7 i was writing this

41. ghazi

it is total of 9 images and two of them are imposed on each other so i am sure it's 7 , up to my knowledge

42. AvengerVirus

is there a possibility that the other 2 image won't be imposed on each other ?

43. ghazi

yes there is if they are not placed at right angle to each other

44. AvengerVirus

so if the angle wasn't 90 we will calculate all the image like 60 360/60-1 = 5 then it will be 15 and we won't say any image is imposed to other right ?

45. ghazi

there are certain angles at which imposition occurs like 30, 60 90 but if we talk about 33.45 there might not be an imposition , but still there is possibility

46. AvengerVirus

ok but how u knew that they will be only two ?

47. AvengerVirus

is there any princible for that ?

48. ghazi

this is what i studied ages ago lol, sorry for that and still i remember you can look up in articles on google you will get to know a lot i am sure

49. AvengerVirus

so i say 7 with 90 % :D

50. ghazi

i guess with 95% :)

51. AvengerVirus

@ghazi what about this explanation Images I1 and I2 are primary images formed by the two plane mirrors. Image I3 was found by reflecting image I2 across the extension of the top mirror. And image I4 was found by reflecting the image I1 across the side mirror.

52. AvengerVirus

@ghazi i think now am 99.99% as let's say three images one on each mirror and three others one on each crease and the last one at the point where they all meet then they r 7 do u agree with that ??

53. ghazi

exactly