Question

Give your opinion about radius of curvature of a convex lens having different f1 and f2 what you would you would the lens called having equal f1 and f2

Answer 1

Answer:

Convex lens converge parallel rays coming from objet at infinity and a highly diminished - point sized, real and inverted image is formed at principal focus F2.

object at infinity convex lens

Fig: Object at Infinity