Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

natasha.aries Group Title

***PLEASE HELP! TEST TOMORROW!*** An object is placed 10.0 cm in front of a mirror. what type must the mirror be to form an image of the object that is 2.00 m away from the mirror? what is the magnification of the image?

  • 6 months ago
  • 6 months ago

  • This Question is Closed
  1. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I got -5 as the magnification, and it also asked whether it was virtual or real, and upright or inverted. I said it virtual and upright.. Can anyone tell me if I am right?

    • 6 months ago
  2. LastDayWork Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    What do you understand by "..away from the mirror.." ??

    • 6 months ago
  3. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry i am not familiar with these type of problems

    • 6 months ago
  4. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Its okay @dumbcow

    • 6 months ago
  5. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    and what do you mean @LastDayWork

    • 6 months ago
  6. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i did find this, it may help http://en.wikipedia.org/wiki/Magnification#Calculating_the_magnification_of_optical_systems

    • 6 months ago
  7. LastDayWork Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Away from the mirror can imply either side..real and virtual..

    • 6 months ago
  8. LastDayWork Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @Mashy Can you help here ??

    • 6 months ago
  9. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    Ok.. first u need to decide if its Convex mirror or Concave mirror.. (its not plain, cause in plain object distance = image distance) now can u first tell me is it convex or concave? (think properly.. u ll get it.. @LastDayWork.. i hope u know which one it is :P)

    • 6 months ago
  10. LastDayWork Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    XD

    • 6 months ago
  11. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    its convex right?

    • 6 months ago
  12. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    why do u think its convex?

    • 6 months ago
  13. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    draw a general ray diagram for convex.. showing objects and images.. then u ll be able to uderstand..

    • 6 months ago
  14. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    but it doesnt give you enough information to decide which one it is?

    • 6 months ago
  15. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    the info is not needed.. only one of them is possible.. just draw a ray diagram.. i am telling.. that ll make u understand!

    • 6 months ago
  16. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i drew it and still dont see how it isnt convex

    • 6 months ago
  17. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    oh wait! is it concave outside?

    • 6 months ago
  18. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    if u drew it properly.. which distance u see bigger? object distance or image distance ?

    • 6 months ago
  19. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1392185681486:dw| this is kinda what the ray diagram is... see where the image is formed..

    • 6 months ago
  20. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah...

    • 6 months ago
  21. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    so which distance is bigger in case of convex? object or image?

    • 6 months ago
  22. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    object

    • 6 months ago
  23. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    good.. so the image is ALWAYS.. ALWAYSSSS.. magnified or diminshed ?

    • 6 months ago
  24. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    diminished

    • 6 months ago
  25. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    so.. now u understand.. why in the rear view mirrors.. they say 'objects are closer than they appear" cause the images are always diminshed.. and we will THINK.. that they are far away.. cause our stupid brains say "hey that car looks small.. so it must be far" ok.. now.. we nailed it down.. that its concave.. right?.. but we are not done yet.. there are stil two possibilities! In concave..

    • 6 months ago
  26. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah! would it be concave outside?

    • 6 months ago
  27. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    what u mean concave outside? o.O

    • 6 months ago
  28. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    there is only one type of concave :P

    • 6 months ago
  29. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    you said there are two possibilities

    • 6 months ago
  30. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    i meant.. in concave mirror itself.. there are two places u can keep the object.. such that u get image 2m away. can you think which are the two cases ?

    • 6 months ago
  31. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    in front of and behind

    • 6 months ago
  32. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    u can't be something BEHIND the mirror.. if u go BEHIND the mirror.. there is NO reflection darling!

    • 6 months ago
  33. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    like inside the focal point and behind the focal point

    • 6 months ago
  34. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    Ahaa.. yea.. thats the one so if the object is kept Between the mirror (pole) and the focal point.. will u get real or virtual image?

    • 6 months ago
  35. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    virtual

    • 6 months ago
  36. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    perfect.. will this be magnified or diminished ?

    • 6 months ago
  37. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    magnified

    • 6 months ago
  38. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    yuppeerrss so.. it could be this case.. so the image could be virtual.. and magnified.. so in this case the magnification is positive hence in this case... magnification = + 200/10 = 20 ( i wonder how u got 5 as the answer o.O) now is it possible to keep the object in such a way, that u get a real enlarged image?

    • 6 months ago
  39. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so would it be the concave that is in front of the focal point just because we have to get a real image and not a virtual one?

    • 6 months ago
  40. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    and where did you get 200 from?

    • 6 months ago
  41. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    you mean "outside its focal point?" YES so in this case ALSO the given condition is satisfied hence.. in this case, the magification is negative magnification = image distance/ object distance ( i am not considering signs .. cause i dunno what sign convention u use.. don't wanna confuse u.. ) image distance = 2m = 200cm object distance = 10cm

    • 6 months ago
  42. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    so in the real case u would end up with Real image, and -20 as the magnification!

    • 6 months ago
  43. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ohh! okay! thank you sooo muchh

    • 6 months ago
  44. Mashy Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    no problem! :) :)!

    • 6 months ago
  45. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    :)

    • 6 months ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.