An image is formed by a convergent lens when the object is placed between lens and focus.Will the focal length be negative or positive.?Explain

Asked by SAYON | 17th Mar, 2017, 05:41: PM

Expert Answer:

Hi,

On basis of New Cartesian Sign Convention, the focal length of a convex lens is considered to be positive and that of a concave lens is considered to be negative. 

Answered by  | 17th Mar, 2017, 06:04: PM

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