what is the mean by power of lens you have three lenses one two third
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Power of lens is the degree of convergence or divergence of light rays .
power of lens is defined as reciprocal of its focal length .
P=1/f [in meters]
Given L1 =+10 D
P1=100/f
10=100/f
f1=100/10=10cm
L2=+5D
f2=100/5=20cm
L3= - 10D
f3= -100/10=-10cm
So first and second lens are convex lens and third lens is concave lens because focal length is negative.
Lens 2 that is with focal length 20cm will produce magnified and virtual image of an object placed at 15cm
Because the position of object is between P and F.
Read more on Brainly.in - https://brainly.in/question/7187218#readmore
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