Question

if the power of lens -0.24 and its focal length is​

Answer 1

-4.166 m

Explanation:

power of lens = 1/focal length

so, focal length = 1/(-0.24)= -4.166m

Answer 2

Answer:

Power of lens= -0. 24

Power is in negative therefore focal length also is in negative. Hence it is concave lens.

therefore,by formula

Power=1/focal length (metre)

-0. 24=1/focal length (meter)

therefore,

focal length= -1/0.24

=-100/24

=-50/12

=-25/6

=-4.16

Hence, Focal length is -4. 16 meter