Question

An object is at a distant of 19 cm from a concave mirror and the image has formed on itself. Find the magnification of the image and the size of the image. Full detailed explanation is required. No spam or copied answer is allowed.

Answer 1

It is given that,

The distance of the object (u) = 19 cm

The distance of the image (v) = 19 cm

Let, the focal length be, 'f' and the magnification be, 'm'

From the relationship we know that,

$m = \frac{-v}{u}$

$or, m = \frac{-19}{19} \\or, m = -1$

So, the magnification is -1.

∵ It should be noted that while the magnificent is negative then the formed image is real. So, real image should be formed.

We know that,

Size of the image $= (u*v)\\= (19)*(-1)\\= - 19 cm$

So, the size of the formed image is -19 cm.

∵ For the size of the mirror,

We know that,

$\frac{1}{f} = \frac{1}{u}+\frac{1}{v}   \\or, \frac{1}{f} = \frac{1}{19} + \frac{1}{19}\\ or, \frac{1}{f} = (\frac{1+1}{19}) \\or, \frac{1}{f} = \frac{2}{19} \\or, f = \frac{19}{2} \\or, f = 9.5 cm$

So, the length of the mirror is 9.5 cm.

Answer 2

Hii ItsAnnesha, A.D. the saviour here. Today I state myself on the truth on which I belonged to. I know you all are my best bros and sis and best friend forever. I will leave and must have to leave someday, you all to leave leave but I know that the intention will remain same forever. I donno that why don't reply on yours comments or anyone's comments, I donno why I a a bit strange but, believe its not my attitude. Someone already has said me, Hey Annesha, being Nasa, IIT & IBM seminar are you showing attitude and why only these, most of the proposals you have got from whose all are scholar and your life partner will also be a scholar as like you, then, how are you different from others??  And whats the need of answering by fake accounts??

Yeah, I have answer for all the questions because, hiding myself is not my character, what was I am, now also I am that and in future too I will remain same, its my character, my promise, I am unique.  Yeah, this one I mean Annesha992, ItsArya, ItzRuleBreaker, TheUnknownKhiladi, Adyashakti, all are my fake accounts and why not I come front by my real id, yup nice question, then answer me, on which day an administrator was able to block any user, never, you too know it, and I too not stand myself for getting slangs by the users, it may can change my phycology a bit, yeah by fake accounts too I too got a bit changed on the beginning of the year a bit, but promised to stand me back in the right position before my birthday and done so, because, promise breaker not I am. Then why don't I visualize my ranks of my real id which I can visualize in my all the ids, nice question, then listen, to be shown off is not also in my character. Then why answering by fake ids, then listen carefully that all are my ids, there is no fake ids while I have created an id, and to keep effort in my all task is my character may I carry power in any id or not. Then, why I don't ban tom85, why I hadn't refused him from gaining any kind ranks, then question to you all that while I haven't any problem regarding what happened with me then I can't understand that why you guys feel problem, yeah if equesta though she is not my close friend at all though if she feels problem then tell her to take actions as I know that the regular moderators too have some powers its not that only the subjugated moderators have all the powers and hope its known to all my guys who belongs to S.M. & R.M. too. Then sis Adriza, Smriti, Sanjana all belongs to S.M., may I can be senior S.M. but they too S.M. an if they feel insulted any day by him then they too can take action, its their matter, why I should have headache regarding this, I too donno it. They have also power. Why I don't allow anyone to inbox me by the real ids who belongs to moderator, any kind? Hmm, mentality and intention will remain always same thinking so is also wrong, hope, you all have understood. Then, my real pic, I mean of a bit large size I have shown to Tom85 and it has to some of my friends but why you haven't seen, well, have you ever asked that annesha, please send a large pic as attachment then edit the answer, never.Now see my pic, oh no no don't ask that why in house dress, why not in the dress of Durga Pooja, because, what I am, I am best on that, that you may like or not but showing of I never like at all. Then, question even measuring my attitude and explaining my characteristics by taking my life-partner, whom I donno even and never interested too in this.

I donno its the truth or lie or there is no such truth which can be greater than this, its my thought and I am strict on this.

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I too don't care that on which eyes you should place me, I am as my own. Whatever other thinks on me I never care. One thing don't think so, that I have hurt because, I never feel sorry, as I don't care anything like that, I cheer up, smile, throw up everything and like to go ahead of my carrier only. Except my carrier nothing can be important to me even any kind of relationship too. My eating, my dating, my sleeping, my caring everything is my carrier only. Its better for all of you that you all should ignore me, hate me. Believe me I should never be a bit bothered I swear and all the best for all of you. ShuvoVijaya.........................