Question

Calculate the power of a lens whose focal length is -20cm . identify the type of lens also.

Answer 1

Answer:

answer is in the attachment

#BAL #answerwithquality

Answer 2

Answer:

we know that,power=100/f (in cm)

Explanation:

given,

focal length=-20cm

p=100/-20cm

p=-10/2

p=-5Diopter

and the lens is used concave lens.