Speed of Light

Light moves slower in air than in a vacuum because air molecules and atoms can interact with the electromagnetic waves of light, causing them to scatter and slow down. In a vacuum, there are no particles to interact with, so light can move through it at its maximum speed of approximately 299,792,458 meters per second.

Because SCIENCE

There is no known way to achieve this, as well as a great deal of consistent

and convincing work in Physics over the past 100 years or so that says it's

fundamentally impossible.

Yes, I am all set, thank you.

Yes I THINK.But he was only measuring from one mile so he got 0.000005 sec.

Plastic coated. The cable has an external cover of poly plastic.

speed of light

Yes, indeed there is. When I get up off the sofa and walk into the kitchen for a

glass of milk, I have accelerated at a higher rate than the acceleration of light,

since the speed of light is constant and it doesn't accelerate.

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If, on the other hand, you're asking if any object has a speed higher than the speed of light, then the answer is a little more subtle. Relativity makes it clear that no object carrying information can travel faster than the speed of light. Until a few months ago, this "speed limit" seemed pretty safe.

Recent experiments at CERN suggest neutrinos going to Italy at a rate faster than the speed of light, but even the CERN experimenters admit they have probably made an error. It's just that nobody's been able to find the error yet.

The speed of light in vacuum is 299,792,458 meters (186,282 miles) per second.

The ultimate answer is that, in our Universe, it just is. There's no reason it HAS to be that way, but it just is -- whether we like it or not.

Anything greater than critical angle will cause the light to just be reflected.

Yes you can. The album cover of Pink Floyd's "Dark Side of the Moon" is a good example.

refractive index

Check the fuse box for wiggling fuses, also make sure that the harness is sitting tight.

Our common terms for distance, miles and kilometers, are useful enough to measure distances around town, and even around the country. But for distances beyond our solar system, it's cumbersome to carry around a bushel-basket full of zeroes to add to the distance measurements.

So we typically phrase things in terms of "light-years", the distance that light would travel on one year. Light moves at 186,000 miles or 300,000 kilometers per SECOND, so a light year is quite a distance; 186000 * 60 * 60 * 24 * 365.24 miles, which is 5,869,552,900,000 miles. The nearest star, Proxima Centauri, is four times FURTHER away at 4.2 light-years, so you can see that the distances to even the nearer stars are quite cumbersome when expressed in conventional units.

In metric terms, we have, perhaps, another way to go. The standard distance is the "meter", and latinate prefixes are used to denote larger quantities, such as the kilo-meter, for 1,000 meters; about 6-tenths of a mile.

In computer terms, the word "byte" is used to designate the storage space required to store one ASCII character. A "kilo-byte" is a thousand bytes (actually, 1024 bytes, but close) and a "megabyte" is a million (plus a bit) bytes. A gigabyte is a billion, and a terabyte is a trillion.

So, let's extend that to astronomy. One light year is 5.8 tera-miles.

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