Multiple Choice
In a radio telescope,the electromagnetic energy is gathered by ________.
A) a glass mirror with a reflective coating,similar to an optical telescope
B) a spherical thin metal foil that refracts the radio waves to a point
C) a parabolic metallic mirror,commonly wire mesh
D) a solid slab or copper metal,formed into the shape of a parabola
Correct Answer:
Verified
Correct Answer:
Verified
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