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Pretty close. The officially accepted standard value is 299,792.458,

which is only about 0.07% less than 300,000 .

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13y ago
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12y ago

In a vacuum, light can travel 300,000 km in just over one second (because the speed of light is exactly 299,792,458 m.s-1).

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11y ago

300,000 km/sec = 300 km in one millisecond.

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6y ago

the mass of proton is 1.67 x 10

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Q: In a vacuum light can travel 300km in 1 what?
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Continue Learning about General Science

What is the wavelength of a 30 GHz radio wave in a vacuum?

EM waves travel at the speed of light in a vacuum. c=f*lambda where c is the speed of light, f is the frequency of the way and lambda is the wavelength. Lambda= c/f = (3x108 m/s)/3x1010 s-1) = 1x10-2 m or 1 cm

How long does it take to travel 1 light year?

It will take 1 year, as soon as you and Albert work out how to travel at the speed of light. ;)

How big is a lightyear in meters?

A light year is a unit of length in space. It is the distance that light travels in a vacuum in one year. Translated to miles it is about 5.9 trillion miles.

Why can light travel through space but sound cannot?

sound is produced by vibration, i.e. when any thing start vibration then it produces sound. for example when a tunnig fork is hit on rubber pad its prongs starts vibration with difinit frequency ad hence produce sound. similarly when the strings of a gittar is dirturbed its starts vibration and hence produces sound. sound required a material medium for their journey, sound can not pass through vaccume because sound waves are mechanical waves.

Standard unit for the speed of light?

The speed of anything is(the distance from point-1 to point-2) / (the time it takes that thing to travel from point-1 to point-2)Consequently, we may write, without fear of confrontation or contradiction,that the speed of light is(the distance from point-1 to point-2) / (the time it takes light to travel from point-1 to point-2)Moreover, after literally centuries of observation and experimentation, by giantsupon whose shoulders we now stand, we are able to write that speed. If thereis no material substance between point-1 and point-2, then the speed is299,792,458 meters (186,282 miles) per second.If there IS material substance in that space then the speed is somewhat less,and varies depending on the substance.It is never more.

Related questions

In a vaccuum light can travl at 300km in 1?

In 1 microsecond.

How long is 1 millisecond?

A millisecond is one thousandth of a second. Light can travel about 300km in a millisecond. Blinking usually takes between 300 and 400 milliseconds.

What does light travel best through?

Light travels fastest in a vacuum with an approximate speed of 3.0 * 108 ms-1.

How fast does light travel in five minutes?

Light travels at a constant velocity, no matter what time it is given to travel. Light would travel at exactly 299,792,458 ms-1 in five minutes, but only in a vacuum.

What is the meter defined as?

A metre is defined as the distance light will travel in 1/299 792 458 seconds in a vacuum.

How many miles does light travel in 1 microsecond in a vacuum the speed of light in a vacuum is 186000 miles per second?

Since a microsecond is a millionth of a second, just divide the distance light travels in one second, by a million.

How many miles does light travel through the air in 1 second?

186,000miles per second in a vacuum, slightly less in air.

At what speed does all EM radiation travel at?

In a vacuum, 3x10^8 ms^-1. Basically the speed of light, it is EM radiation afterall.

What is refer by light year?

A light year is the distance which light will travel in a vacuum. Light travels at 299,792,458 m/s in a vacuum, one year is 31557600s (on average taking into account leap years) so 1 light year is 9.46073x10^15m or 9 460 730 473 000 km

What does light years mean?

LIGHT-YEAR (noun)The noun LIGHT-YEAR has 1 sense: 1. the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometersFamiliarity information: LIGHT-YEAR used as a noun is very rare.

What distance does light travel in 1 nanometer also does this refer to the full cycle or wavelength?

1 nanometer is a distance. In vacuum, light travels 1 nanometer in about 3.3 x 10-18 second.Did you intend to ask "What distance does light travel in one nanosecond ?" ?Light travels 29.98 centimeters (rounded) in one nanosecond, which is onlyabout 2% different from 1 foot.So an easy way to remember it is: 1 light-nanosecond = 1 foot.1 full cycle is 1 wavelength.

Is light faster than speed?

Your question makes no sense.The speed of light in a vacuum is c = 3 x 108 ms-1In simple terms, a photon of light will travel approximately 300,000,000 metres in 1 second.It's generally accepted that a particle cannot travel faster than the speed of light.