Which of the two has a greater power, a lens of short length or a lens of large focal length?

What is the meant by power of a lens? How the power of a lens related with focal length?

Which causes more bending (or more refraction) of light rays passing through it, a convex lens of long focal length or a convex lens of short focal length?

Which lens, thick or thin has greater focal length?

The power of lens depends on the focal length of the lens

The teacher shows a thin lens and a thick lens. a. Which of these lens forms more enlarged image ? b. Which lens has greater focal length?