The Power of a Lens is - 4.0 D, then it Means that the Lens is a - Bzziii.com

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If the power of a lens is - 4.0 D, then it means that the lens is a 

A. concave lens of focal length -50 m 
B. convex lens of focal length +50 cm 
C. concave lens of focal length -25 cm 
D. convex lens of focal length -25 m




C. concave lens of focal length -25 cm 

Explanation:

P = -4D

P = `"100"/"f(cm)"`

f(cm) = `"100"/"P"`

`"100"/"-4"` = -25 cm.



Comments

  1. RupamFebruary 11, 2022 at 11:57 PM

    Very nice artical...thanks a lot for poviding such a educational website for class 11th and 12th students

    ReplyDelete

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