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 11 months ago
***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?
 11 months ago
***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?

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natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0I 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?

LastDayWork
 11 months ago
Best ResponseYou've already chosen the best response.0What do you understand by "..away from the mirror.." ??

dumbcow
 11 months ago
Best ResponseYou've already chosen the best response.0sorry i am not familiar with these type of problems

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0Its okay @dumbcow

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0and what do you mean @LastDayWork

dumbcow
 11 months ago
Best ResponseYou've already chosen the best response.0i did find this, it may help http://en.wikipedia.org/wiki/Magnification#Calculating_the_magnification_of_optical_systems

LastDayWork
 11 months ago
Best ResponseYou've already chosen the best response.0Away from the mirror can imply either side..real and virtual..

LastDayWork
 11 months ago
Best ResponseYou've already chosen the best response.0@Mashy Can you help here ??

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2Ok.. 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)

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0its convex right?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2why do u think its convex?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2draw a general ray diagram for convex.. showing objects and images.. then u ll be able to uderstand..

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0but it doesnt give you enough information to decide which one it is?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2the info is not needed.. only one of them is possible.. just draw a ray diagram.. i am telling.. that ll make u understand!

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0i drew it and still dont see how it isnt convex

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0oh wait! is it concave outside?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2if u drew it properly.. which distance u see bigger? object distance or image distance ?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2dw:1392185681486:dw this is kinda what the ray diagram is... see where the image is formed..

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2so which distance is bigger in case of convex? object or image?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2good.. so the image is ALWAYS.. ALWAYSSSS.. magnified or diminshed ?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2so.. 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..

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0yeah! would it be concave outside?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2what u mean concave outside? o.O

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2there is only one type of concave :P

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0you said there are two possibilities

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2i 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 ?

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0in front of and behind

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2u can't be something BEHIND the mirror.. if u go BEHIND the mirror.. there is NO reflection darling!

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0like inside the focal point and behind the focal point

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2Ahaa.. 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?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2perfect.. will this be magnified or diminished ?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2yuppeerrss 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?

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0so 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?

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0and where did you get 200 from?

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2you 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

Mashy
 11 months ago
Best ResponseYou've already chosen the best response.2so in the real case u would end up with Real image, and 20 as the magnification!

natasha.aries
 11 months ago
Best ResponseYou've already chosen the best response.0ohh! okay! thank you sooo muchh
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