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Cool goIITian

Joined:	26 Apr 2008
Post:	53

28 Apr 2008 14:21:35 IST

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421

Convex and Concave lens

None

Can anybody tell me to diffrentiate between concave and convex lens?? How to identify these lens?

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Learner .

Blazing goIITian

Joined: 5 Nov 2007

Posts: 507

29 Apr 2008 17:06:35 IST

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If you can focus some light from an overhead source onto a point on the ground,its a convex lens.Otherwise its concave!!!!!!

Shruti Sridharan

Cool goIITian

Joined: 26 Apr 2008

Posts: 53

30 Apr 2008 18:06:49 IST

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but how to v identify whether it is concave or convex mirror??

like in a spoon, how to tell whether concave or convex ??

I didnt mean lens . I meant mirror

Learner .

Blazing goIITian

Joined: 5 Nov 2007

Posts: 507

30 Apr 2008 18:27:47 IST

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keep it about a foot away (in case of most spoons) from your face and look into it..if your face looks small and erect,its convex...if its inverted,or if its erect and magnified,its concave

Shruti Sridharan

Cool goIITian

Joined: 26 Apr 2008

Posts: 53

4 May 2008 16:36:28 IST

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thx learner !!

i got it !!!

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