What is meant by the power of the lens? A student uses a lens of focal length 40cm and another -20 cm. Write the nurture and power of each lens.
Dear Student ,
Here is a link given below which will help you to get the answer of this question with proper explanation .
https://www.meritnation.com/ask-answer/question/define-power-of-a-lens/science/9851719
Here the convex lens has positive focal length and the concave lens has negative focal length .
Power of convex lens = P1 = 100 / 40 = 2.5 D
Power of concave lens = P2 = 100 /(-20) = - 5 D
Regards
Here is a link given below which will help you to get the answer of this question with proper explanation .
https://www.meritnation.com/ask-answer/question/define-power-of-a-lens/science/9851719
Here the convex lens has positive focal length and the concave lens has negative focal length .
Power of convex lens = P1 = 100 / 40 = 2.5 D
Power of concave lens = P2 = 100 /(-20) = - 5 D
Regards