Which example shows that electromagnetic waves can travel without moving through a specific material (medium)?

A.
light traveling to the earth from an orbiting satellite

B.
light traveling through a glass window

C.
rings made by a pebble when dropped in water

D.
sound traveling through air

Question

Which example shows that electromagnetic waves can travel without moving through a specific material (medium)?	
 
 A.
light traveling to the earth from an orbiting satellite
 
 B.
light traveling through a glass window
 
 C.
rings made by a pebble when dropped in water
 
 D.
sound traveling through air

rvc · Answer

A

rvc · Answer

i suppose @Mashy

anonymous · Answer

The question doesn't make much sense to me. However, I guess it is C.

anonymous · Answer

Please answer my question :) just bumped it

anonymous · Answer

@rvc 
yes you are rights.. its A

anonymous · Answer

???

ybarrap · Answer

Light from the sun is another example where electromagnetic waves travel in a vacuum (that is, without a specific material). Radio waves traveling from satellites to earth or from rovers on Mars to the earth are other examples.

So, electromagnetic waves do not need a medium or material to propagate. Therefore, light reaching a satellite (which is in the vacuum of space) from earth is an electromagnetic wave traveling without moving through a specific material (medium).

Hope this helps.