Question

3. What is meant by power of a lens ? You
have three lenses L1, L2 and L3 of powers
10D, 6D and 10D respectively. State the
nature and focal length of each lens.
Explain which of the three lenses will form
a virtual and magnified image of an object
placed at 15 cm from the lens. Draw the ray
diagram in support of your answer.​

Answer 1

Answer:

Power of lens is the ability of the lens to converge the rays of light falling on it. It can also be defined as P=1/f where f is the focal length. ... One Dioptre is the power of a lens whose focal length is 1 metre. Convex lens has positive power while concave lens has negative power...