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The speed of light depends on the medium through which it passes. The fastest that light can travel is the speed of light in a vacuum (c), which is 299,792,458m/s. The permittivity and permeability of the medium through which it passes are what reduces the speed of light.

For example, while the speed of light in air can be simplified to being approximately 3*10^8m/s, in an optical fibre, it is reduced to approximately 2*10^8m/s, that is, two thirds of it's speed in a vacuum.

Light will easily propagate through an insulating medium, though will not do so through a conductor, as the electric and magnetic fields generated by the electromagnetic radiation will interact with those of the conductor.

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What is the speed of light while traveling 0 c?

The speed of light depends on the refractive index (optical density) of the medium through which it travels. It is not affected by temperature.


What happens to the speed of light as light travels though materials?

The speed of light is not affected by the density of the medium. Its the path of the light that is affected . Phenomenon like reflection or refraction take place when the light goes to different medium


How would the speed of an object be affected if it were in a vacuum?

Assuming you keep applying a constant force, it will accelerate indefinitely up to the speed of light


Is the speed of light in a medium affected by the velocity of the light as it enters a new medium?

No. The speed of light is determined by the electrical characteristics of the medium it's in, regardless of what medium it came from or what medium it's headed for when it leaves this one.


Which factors affect the velocity of light?

The speed of light in a vacuum is constant. Otherwise, the speed of light will depend on what materials it travels through. For example, the speed of light in air is similar to the speed of light in a vacuum; in water, it is quite a bit slower.


How is the speed of light affected as it passes at an angle from air to water?

The speed of light decreases as it passes at an angle from air to water due to the change in the medium's refractive index. This change causes the light waves to bend or refract. The speed of light is slower in water than in air because water has a higher refractive index.


Isn't the speed of light variable with crystals such as diamonds?

The speed of light is not variable with crystals like diamonds, but it can be affected by the medium it travels through. In diamonds, light slows down due to its high refractive index, but the speed of light in a vacuum remains constant at approximately 299,792 kilometers per second.


Why Speed Of Light is not affected by Earth's Magnetic Field although Light is considered to be an Electromagnetic wave?

As light can also travel in vacuum so no extra force can change its direction.


How fast does light normally travel in air?

The speed of light is about 300,000 kilometers per second in a vacuum. In air, it is bout 90 kilometers per second slower. Light speed is a constant regardless of the frame of reference of the observer, but it's speed has been proven to be affected by different mediums.


How ligth is affected passing throug water?

When light passes from air to water, the light is refracted because water is denser than air and therefore slows down the speed of the light.


Do speed of light depends on some factors as speed of sound depends on temperature?

The speed of light in a vacuum is constant and does not depend on external factors like temperature. However, when light passes through a medium other than a vacuum, such as air or water, its speed can be affected by factors like the refractive index of the medium.


If light has mass then it cannot travel at the speed of light if it has no mass it would not be affected by gravity Therefore the math for the infinite mass theory at light-speed must be reexamined?

Wrong, Light has mass and does travel at the speed of light and is affected by gravity! Light mass: hf=mc^2 means m=h/cw. Optical mass is m-red=2.96e-36 kg (w=.75um). Violet would be double 5.92e-36 kg. The math for the infinite mass theory at light-speed is also wrong.- -------- Light has no resting mass, just energy. Gravity is a bend in space, therfore Gravity does not pull at light but the light 'bends' with space