Question

Define power of a lens. What is its unit? One student uses a lens of

focal length 50 cm and another of –50 cm. What is the nature of

the lens and its power used by each of them?​

Answer 1

Answer:

You have the eqn of power of lens by using this you can solve but in this first find nature which is real image then using focal length formula find individual power then add both individual powers hence you will get answer