Question

Which example shows that electromagnetic waves can travel without moving through a specific material (medium)? . . . A.. visible light through a prism. . . B.. sound traveling through a steel beam. . . C.. X rays through skin and muscle. . . D.. light passing through a vacuum tube

Answer 1

example shows that electromagnetic waves can travel without moving through a specific material  is
light passing through a vacuum tube
because it shows that there is no medium
so correct option from above is D
hope it helps