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King
Group Title
A convex mirror of focal length f produces an image half of the size of the object. What is the distance of the object from the mirror?
 2 years ago
 2 years ago
King Group Title
A convex mirror of focal length f produces an image half of the size of the object. What is the distance of the object from the mirror?
 2 years ago
 2 years ago

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Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Use lens formula
 2 years ago

King Group TitleBest ResponseYou've already chosen the best response.1
1/v1/u=1/f? that one?
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Object distance = u image distance = v Height of image / height of object = v/u
 2 years ago

King Group TitleBest ResponseYou've already chosen the best response.1
yeah as in can u post the sol.?
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
see now, h / 2h = v/u u = 2v
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
\[1divv 1divu =1divf\]
 2 years ago

King Group TitleBest ResponseYou've already chosen the best response.1
\[1/v1/u=1/f\]
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
dw:1332858999064:dw
 2 years ago

King Group TitleBest ResponseYou've already chosen the best response.1
why is it 2v?
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Becoz, in calculation, u should take object distance as negative. So, u becomes u. And hence 2v
 2 years ago

King Group TitleBest ResponseYou've already chosen the best response.1
ok so u get 3/2v=1/f 2v=3f
 2 years ago

King Group TitleBest ResponseYou've already chosen the best response.1
aadarsh u der?
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Then, equate v = 3f / 2
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Substitute it in the formula: 1/v  1/u = 1/f
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
U r correct
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Yeah, soorry. Then don't use  2v in the formula. use 2v. U may get it.
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Oooooooooooo. Gtg. Byeeeeeeeeeee. ur result?
 2 years ago

King Group TitleBest ResponseYou've already chosen the best response.1
in what 9th .....94.83%
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Super. Congrtas. Ready for US trip?????????????
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
PLz reply to my email. plzzzzzzzzzzz
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
@aadarsh, u have successfully completed 10th so tell me, can a convex mirror produce an image which is half of the object's height?
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Arre Shalini didi and king, I think I was in a dream while solving this question. I thought it to be a convex lens instead of a mirror. Here is the detailed answer. Sorry for mistake.
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Mirror Formula: 1/v + 1/u = 1/f And, h'/h = v/u (magnification formula) So, given, h'/h = v/u = 1/2............(i) So, u = 2v.......(ii) Now, 1/v + 1/(2v) = 1/f Or, 1/2v = 1/f Or, f = 2v Or, f = 2v So, f = u [From (ii)]
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
u havent answered my question yet aadarsh can a convex mirror , produce an image which is half of the object's height? i wud like to add one thing here be very clear to visualise the ray diagrams for any lens or mirror b4 solving sum
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
@salini akka, i think a convex mirror can produce an image half size of that of object, in some cases, when object is between infinity and pole of mirror.
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
oh my! check ur 10th book aadarsh
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
didi, its given that it will form a diminished, virtual and erect image. That's all na?????????
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
ya so will it produce a halfsized image?
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
not really. BUt can it not produce in some cases???????????????
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
i am curious when? when our bible says no it is a no u know wat i mean by bible dont u?
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Yeah, "Bible" means Book. (NCERT) Can u plz say why it cannot?
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
its the property of convex mirror to always form virtual diminished(not even the quarter of size of object)_ how? it was found by great ppl all we do is read them right?
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
whenever u see a question related to lens or mirrors flash the image formation diagrams b4 the formula @king ur question is wrong
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
How didi? question is wrong? See my process . Everything is correct. But u r true taht a convex mirror cannot form an half image image.
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
:) see ur text book and read my last comment it will help u
 2 years ago

Aadarsh Group TitleBest ResponseYou've already chosen the best response.2
Yeah, u r rite didi. I was mad at the first itself.
 2 years ago
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