In a Radio Telescope, the Electromagnetic Energy Is Gathered by ___________

Multiple Choice

In a radio telescope, the electromagnetic energy is gathered by ___________.

A) a spherical thin metal foil that refracts the radio waves to a point
B) a parabolic metallic mirror, commonly wire mesh
C) a solid slab or copper metal, formed into the shape of a parabola
D) a glass mirror with a reflective coating, similar to an optical telescope