If lens A has focal length +15 cm and lens B has focal length +30 cm, find out which lens has more power?
Lens A has more power
Lens B has more power
Power of the lens cannot be determined
Both have the same power
If lens I with focal length + 15 cm and lens II has focal length + 30 cm. find out which lens has more power?
The lens A has a focal length of 25 cm whereas another lens B has a focal length of 60 cm. Giving reason state, which lens has more power : A or B.