if the image formed by a lens for all positions of an object placed in front of it is always erect and diminished what is the nature of the lens draw a ray diagram to justify your answer if the numrical value of the power of the lens is 10 what is its focal length in the cartesian system
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Nature of lens is Concave.
Focal length is 10cm.
Focal length is 10cm.
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It is concave lens...
If p=10 than f=100/10cm=10cm
As it is concave lens so f will be negative and so f=-10cm
If p=10 than f=100/10cm=10cm
As it is concave lens so f will be negative and so f=-10cm
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