Fill in the blanks:A convex lens of ______ focal length gives a greater magnification than lenses of _______ 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 of the two has a greater power : a lens of short focal length or a lens of large focal length ?
A convex lens that has a very short focal length will cause a?
Draw a diagram to show how a converging lens held close to the eye acts as a magnifying glass. Why is it usual to choose a lens of short focal length for this purpose rather than one of long focal length ?