They travel in open spaces
The source that emitted the sound wave.
Electromagnetic waves travel in a transverse direction, which means they propagate perpendicular to the oscillating electric and magnetic fields. This allows them to travel through space at the speed of light in a straight line.
Electromagnetic waves travel in a straight line and in all directions away from their source.
This phenomenon is called coherence, where light waves maintain a constant phase relationship as they propagate. This is important for applications like holography and optical coherence tomography.
As sound waves travel away from their source, the intensity (loudness) of the sound decreases due to the spreading out of the energy over a larger area. This phenomenon is known as the inverse square law, where the intensity decreases proportionally to the square of the distance from the source.
As the light source moves away from the observer, the wavelength of the light waves increases, causing the light to shift towards the red end of the spectrum. This phenomenon is known as redshift and is due to the Doppler effect. Eventually, if the source is moving fast enough, the light may shift into the infrared or even microwave region.
towards the normal
It depends if its transverse or longitudinal.
If you're talking about electromagnetic waves, like light and radio, there's no limit on how far they can go once they're emitted. But they spread out as they travel, and the farther you are from the source, the thinner the energy is in the part of the wave that you can collect. So the only limit is: How far away from the source can you detect the waves ? In other words, how sensitive is your receiver ?
As you move away from a light source, the amount of light that reaches your eyes decreases due to the spreading out of light waves. This phenomenon is known as the inverse square law, which states that the intensity of light diminishes inversely proportional to the square of the distance from the source. This means that the further you are from the light source, the less intense the light will appear.
Light spreads out as it travels further away from its source due to a property called divergence, which causes the light waves to spread out in all directions. This spreading is a result of diffraction, where light encounters obstacles or openings that cause it to scatter or bend.
Sure, all you need to do is to travel away from the source at sufficient speed.