an object is placed at a distance 10cm from a lens of power -4D. find the position and nature of image so formed.
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Answered by
1
You can use the formula of power
P=1/f
by the way you find focal length
and then use the formula of lens= 1/v-1/u=1/f
P=1/f
by the way you find focal length
and then use the formula of lens= 1/v-1/u=1/f
Anonymous:
Give full solution
Plz
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Answered by
8
I m writing a short cut....
-4 = 1/ f
Therefore f= 1/-4
1/v - 1/u = 1/f
1/ 10 - 1/u = 1/ -4
1/10 + 1/4 = 1/u
2+5/20
7/20 = 1/u
u = 20/7
= 2.85
Probably this is the ans
If yea... i hope it will help you
-4 = 1/ f
Therefore f= 1/-4
1/v - 1/u = 1/f
1/ 10 - 1/u = 1/ -4
1/10 + 1/4 = 1/u
2+5/20
7/20 = 1/u
u = 20/7
= 2.85
Probably this is the ans
If yea... i hope it will help you
Wrong answer
But tq for doing it.
Its ok
But how is it wrong tell me afterwards plz
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