please tell I will definitely mark u as brainlist promise and give a logical answer please
Answers
Explanation:
We know that light doesn't need a medium through which to travel because the speed of light is experimentally constant: independent of the movement of the source or detector or the direction in which it travels.
Light contrasts with sound, which travels through the air (or some other material medium). If you're stationary with respect to the air, then the speed of sound is the same in all directions. But if you're moving with respect to the air, the speed of sound will be the same in all directions relative to the air—which means that sound coming up in front of you will seem faster and sound catching up to you from behind will seem slower.
If light were a disturbance in a medium, it would exhibit the same behavior. But light never does—its speed is the same under all circumstances. So it does you no good to postulate an aether. You can still do it, but it makes the theory more complicated than necessary. The only reason to postulate an aether is that you're uncomfortable with the idea of waves not needing a medium. But our modern understanding of quantum mechanics is that all kinds of particles have a wavelike nature, so, if you accept that matter can travel through empty space, you should have no problem accepting the same for light.
Answer:
light is an electromagnetic wave.
it doesn't need any medium to travel.
becoz the speed of light is constant.
light travel independently..
In the case of sound it is a mechanical wave.
they need medium to transfer the energy..
speed of sound is different in different medium.
but in the case of light the Speed of light is constant.
which is approximately near about 3 lakh kilometres per sec.
electromagnetic waver are different from mechanical wave..
we know that light also have particles which is called as photon.
it is a small energy packets.
whose mass is negligible. having certain mass.
if it does not have mass then light doesn't exist