The two convex lenses shown have different focusing powers.
Which is the more powerful lens?
How many times is the more powerful lens more powerful?
Light rays diverging from a point are incident on a convex lens, as shown in the diagram. Which of the other diagrams, (A), (B), (C), and (D), most correctly shows the directions of the rays that exit the lens?
At which of the points , , , , and shown in the diagram is the angle of refraction greatest?
Part of a convex lens is shown. No light rays pass through the lens, but several possible lines normal to the surface of the lens are shown.
Which line on the left-hand side of the lens is normal to the surface at the point that the line contacts the surface?
Which line on the right-hand side of the lens is normal to the surface at the point that the line contacts the surface?