is the speed of infared light and laser light different to white light?If it is what are the speeds of the different types of lightplease provide some reference links thanks
The speed of light is a constant in a vacuum. This is for all Electromagnetic waves.
Velocity of all types of light is same in vaccum.Laser,X-rays,radiowaves,ordinary light wave all have the same velocity.Velocity of light inside a medium is different for different lights depending on their wave length,this is called dispersion and because of this a prism splits white light into a spectrum.The following relation gives the velocity of light in a medium of referective index mu: velocity inside a medium=velocity in vacuum/mu. IVAN.
No, all electromagnetic radiations travel at the same speed, which is commonly known as the speed of light, or c This speed is about: 299 792 458 m / s or approximately 300,000 kilometers per second. Check the link below.
Light and every other type of electromagnetic wave which is the same stuff as light travels at the same speed when traveling through empty space. That speed is 2.998*10^8 meters per second. Also, it is only called light if it is visible to humans. For anything else, I tend to use words such as ray, radiation, or wave. The only time when the speed of an electromagnetic wave is less than the standard speed of light is in optically dense media, such as glass or water. In such a case, the refractive index (number which tells us the medium speed of light) can depend on frequency and is why we can see a rainbow. Spectral variation of refractive index is exclusively a property of the optically dense medium.
The speed of light is constant, only the wavelength differs. all light travels at exactly 299,792,458 meters per second. the only time the speed of light changes is near extreme gravitational pull (like dark holes, which is where they get their name from).
