Which one of the following lenses is a converging lens? a) convexo-concave lens b) plano-concave lens c) double-convex lens. d) spherical-convex lens

Gam radio signals can usually be heard behind a hill, but fm often cannot. that is, am signals bend more than fm. explain. (radio signals, as we shall see, are carried by electromagnetic waves whose wavelength for am is typically 200 to 600 m and for fm about 3 m.)

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?