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Why is the statement the speed of light is 300millon ms not always correct?
Wiki User
∙ 6y ago
When you have an interest in more signficant figures: 299,792,456 m/s. It was measured in 1983 using wavelengths of a certain light from an atom, and that is what we got stuck with.
When the light is less energetic than X-rays and is moving through something other than a hard vacuum.
When you are accelerating significantly, you can get all sorts of funny values.
When you measure the speed of light over a path involving significant mass, you get a "path speed" of less than c even if it is through a vacuum. (Shapiro time delay.)
Light travels through different types of matter at different speeds
Genoveva Quitzon
Wiki User
∙ 12y agoWhen you have an interest in more signficant figures: 299,792,456 m/s. It was measured in 1983 using wavelengths of a certain light from an atom, and that is what we got stuck with.
When the light is less energetic than X-rays and is moving through something other than a hard vacuum.
When you are accelerating significantly, you can get all sorts of funny values.
When you measure the speed of light over a path involving significant mass, you get a "path speed" of less than c even if it is through a vacuum. (Shapiro time delay.)
Light travels through different types of matter at different speeds
Wiki User
∙ 14y agoThis statement is never correct.
The statement that is almost correct is that the speed of light is 3 x 108m/s.
The always correct one is that the speed of light in a vacuum is 3 x 108m/s
The speed of light through anything other than a vacuum is less than c.
Wiki User
∙ 14y agoThe speed of light can be changed when the medium (whatever the light is traveling through) differs. Jean Bernard Léon Foucault discovered in 1850, that light travels more slowly through transparent media such as air, water, and glass, due to the refractive properties of these media.
Wiki User
∙ 12y agoThere are two reasons:
-- "300 million m/s" is itself incorrect. That number is a convenient approximation,
easy to remember and repeat. The correct figure, in vacuum only, is 299,792,458 m/s.
-- The speed of light is different in different substances, and depends on the substance.
In any material substance, the speed is always less than in vacuum.
Wiki User
∙ 6y agoYou need to specify the medium. The speed of light IN A VACUUM is always exactly 299,792,458 meters per second - FOR ANY OBSERVER. The speed of light in water, air, glass, etc. is usually less than that.
Wiki User
∙ 11y agoBecause that's its speed in a vacuum (it highest rate of speed),
in other mediums its slower.
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When you turn on a light or other electric appliance you close a circuit?
This statement is correct.
What is a statement that is not true about a white light?
White light is monochromatic light.
Do electromagnetic waves travel through a meidum by the speed of light?
Electromagnetic waves will travel with the same speed that light travels in that medium. Be careful though, the speed of light in vacuum or air is 300000 Km/s. That doesn't mean that in any medium it would be this. It depends on the nature of the medium. In any case, the first statement ALWAYS holds.
Is the flash as fast as the speed of light?
NO.... the speed of light is always faster. =)
Is the statement the sun only gives off visible light correct?
False. The Sun radiates electromagnetic energy in all parts of the spectrum, not just the tiny sliver that is "visible light". Additionally, the Sun gives off hard radiation in the form of alpha and beta particles, and a considerable "solar wind" of charged atomic nuclei.
When you turn on a light or other electric appliance you close a circuit?
This statement is correct.
Why is the statement the speed of light is 300 million not always correct?
The speed of light, or c, is a constant. The speed of light is exactly 299,792,458 meters per second IN A VACUUM. That's 670,616,629.2 miles per hour or 983,571,056 feet per second.
Why is the statement speed of light is 300 million miles per second is not always correct?
First of all it's 300 million metres per second (299,792,458 m/s). this is in a vacuum when the speed of electromagnetic radiation is at its greatest.
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No not always,But it will correct problem 99% of the time. Brett
Why is the statement the speed of light is 300 milllon miles per sec not always correct?
The speed of light, which is about 300,000,000 m/s, can be affected by the material that it is travelling through. Mediums such as air, glass, and water can slow light down. For example, in water, light travels at a speed of about 200,249,000m/s; in ammonia gas, it travels at 221,200,000m/s; and in ethanol, it travels 220,400,000m/s.
Explain why the statement the speed of light is 3 million MS is not always correct?
I'm going to remark that "The speed of light is 3 million meters per second" is NEVER correct. The speed of light in vacuum ... within 0.07% ... is 3 hundredmillion meters per second. The speed is different in any material medium, but a speed of 3 million m/s would imply a medium with a refractive index of 100, and I'm pretty sure that no such material exists.
THE SUM OF the central angles of a circle depends on the measure of the radius?
Never. The radius of any central angle of one circle will ALWAYS be the same. And not only that ... To answer the question (or to correct the statement that was stated in the place where a question was to be expected): THE SUM of the central angles of a circle is always 360 degrees, whether the radius of the circle is 1 nanometer or 1 light-year.
What is a statement that is not true about a white light?
White light is monochromatic light.
During cold winter months the tire pressure monitoring light is always on how do you suspend it?
Make sure the tires have the correct pressure.
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Would you use lite or light when making a statement of we want to lite fireworks?
You would want to use the word light when making the statement "We want to light fireworks
Is it correct to say that in every case any radio wave travels faster than any sound wave?
Yes. Radio is a form of electromagnetic wave, so it travels at the speed of light. Since sound requires a physical medium and it is (theoretically) impossible for matter to attain the speed of light, the speed of sound can never be equal to/above the speed of light, and this statement is correct.
