Question

the power of lens is =0.5D find its focal length​

Answer 1

Answer:

n physics, energy is the quantitative property that must be transferred to a body or physical system to perform work on the body, or to heat it. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

Answer 2

It is. a concave lens of focal length 5 m.

HOPE ITS HELPFUL

MARK ME AS BRAINLIST