Optics - mirror question : AIEEE type.

1

Pavithra Ramamoorthy ·2009-01-13 20:20:41

pls post it sky.....;_)

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rahul wadhwani ·2009-01-21 00:58:00

use newton's formula f²=d₂*d₃ d₂ is object distance from focus , d₃ image distance from focus from this focus is 6 cm as mirror focal length does not depend on medium so f=-6cm but typical if it was lens think???

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skygirl ·2009-01-19 07:54:07

hmm... its for any mirrors ...

whether it works for lenses, will think n say....

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raamprasad ·2009-01-19 06:34:56

skygirl

is it applicable for any mirror,lens ?????????????????????

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sridutt3 T ·2009-01-17 23:26:51

fine then

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skygirl ·2009-01-14 04:02:21

exactly Akshay it is Newton's Law.

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Akshay Pamnani ·2009-01-13 21:05:56

@ Aarogorn,it is Newton's Law in Optics

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11

Anirudh Narayanan ·2009-01-13 20:34:03

how did you get it, sky??? [7]

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Honey Arora ·2009-01-13 20:31:06

applicable for any u,v?

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11

Subash ·2009-01-13 20:26:46

thnx for the new method

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11

Anirudh Narayanan ·2009-01-13 20:26:28

i knew u were gonna post this. how did u get this?

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skygirl ·2009-01-13 20:25:08

formula: u.v.= f² (u=object from focus, v = image from focus)

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11

Anirudh Narayanan ·2009-01-13 20:01:45

6 cm????

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Subash ·2009-01-13 20:18:35

right then post it

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skygirl ·2009-01-13 20:16:19

actually i got to knoe the method.. n am wishing to share it wid all of you :)

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Honey Arora ·2009-01-13 20:14:37

thn say reducing time method..........right?

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11

Anirudh Narayanan ·2009-01-13 20:14:11

yes, honey.
Sky was that why you were telling in 1 min?

It will come out to
x²=36

I don't think solving this will take >1 min [3]

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skygirl ·2009-01-13 20:12:53

okie... then the method i will say .... will be in 10 secs [3]

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Honey Arora ·2009-01-13 20:12:14

u cn use uv/u+v = f to reduce time

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11

Anirudh Narayanan ·2009-01-13 20:11:02

Why not in 1 min??

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skygirl ·2009-01-13 20:10:04

in 1 min ??? [7] [5] [4]

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11

Anirudh Narayanan ·2009-01-13 20:08:36

If focal length is x.

Then u=-(x+4)

v=-(x+9)

f=-x

Substitute in mirror formula and solve [4]

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1

skygirl ·2009-01-13 20:04:07

method ??

and sign ??

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mirror question : AIEEE type.

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