Do we need any medium to transport electromagnetic waves?
Why don't electromagnetic waves require a medium to travel?
Can electromagnetic waves be reflected? Waves travelling through a solid medium are which waves? In what medium does light (photon) travel? If light is a wave, then what is the medium? Why do radio waves travel at the speed of light and not sound? Why can't sound travel in a vacuum? What should we do if we want a sound wave in space? How do electromagnetic waves travel in a straight line? Is light just visible electromagnetic waves? If light is a wave, what is the medium that is "waving"? How does electromagnetic wave transfer energy? Could sound waves leave traces in any surface or medium? How do radio waves travel? Why can't radio waves transmit through water? Why does light bend towards normal and not away from normal when traveling from a rarer to a denser medium? Are electromagnetic waves and sound waves related? Is a light ray an electromagnetic wave? Are damped electromagnetic waves damped in time or in space? Why does the speed of light vary between different mediums? When light travels from one medium to another, its speed changes, why is this so? Why can't we hear ultrasonic and infrasonic sound waves? Can radio waves be converted into electrical waves? How do they prove that light travels in wave? How can a radio wave travel through space forever? Doesn't it eventually run out of energy? How long would it take a sound (like a radio wave) to travel 1 light year? Can infrared waves pass through walls? Does passive transport really not require energy? How do waves spread through emptiness? Light needs a medium to travel, so how does sunlight come from space? Do massless particles have to travel at the speed of light? Would it be ever possible to travel at the speed of light?