satellite dish has a focal point and cannot concentrate electromagnetic energy to a small point (true or False

Answer 1

If I recall correctly this is exactly how a satellite dish works, it's an elliptic paraboloid whose geometric properties cause energy making contact with its surface to be reflected to the focal point.

Answer 2

The dish can concentrate electromagnetic energy to a small point--that is what it is used for. The size of the smallest point obtainable is determined by the wavelength of the electromagentic waves.