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Speed of Light

Denoted with the symbol "c," the speed of light is 299,792,458 metres per second and is often rounded as 300,000 kilometres per second or 186,000 miles per second.

1,290 Questions

How long would it take for the speed of light to travel a quintillon miles?

The speed of light doesn't travel anywhere. However, light itself, traveling through

vacuum at the speed of light, covers 1 quintillion miles in about 170,108 years.

That's less than 7 percent of the distance to the nearest galaxy.

(Note: The American definition of 'quintillion' is used . . . 1 x 1018 .

Using the British definition of the same word (1030), the answer is

the same, only 1 trillion times bigger.)

How much is 17 light minutes?

It's how far does light go in 17 minutes . . . . 305.7 million km, equal to the diameter of the Earth's orbit.

What is the speed of light in air in miles per second?


With an exhaustive internet search lasting literally seconds, I found that the refractive index
of air at sea level is 1.000293 . That was just what I was looking for. It tells us that the speed
of light in sea-level air is (speed of light in vacuum) / (1.000293) .

(186,282.397) / (1.000293) = 186,227.8 miles per second .

How fast is the speed of light in mph?

1mile = 1.609 km

Speed of light in kms-1 = 300000 kms-1

Speed of light in miles per sec = 300000/1.609 ms-1

= 186451.21 mps

In mph, speed of light = 671224362.958 mph

How does the environment influence culture in Ghana?

The environment is hot, and it's always stifling indoors. I'm sure this must

help to explain the warmth of the people, and their outgoing nature.

How long would it take for speed of light to travel a quintillion miles?

The speed of light doesn't travel at all. It just lays there, typically

on a printed page in a book.

If an object is traveling at the speed of light, however, then it's a

completely different story. Such an object would cover 1 quintillion

miles in only 170,108 years (rounded).

Is hubble flow faster than light?

Because the term 'Hubble flow' is more about a relationship between distance and velocity, it might not have meaning to describe the flow itself as having any particular speed. Hubble flow encompasses the observed expansion of matter in the universe; the further away a galaxy is, the faster it appears to be receding from us, measurable by the redshifting (Doppler effect). This would tend to imply that at the most extreme distances, galaxies may be receding from us at velocities approaching the speed of light, and would thus be redshifted into invisibility and become unobservable, thereby placing a boundary on the visible universe; however, this effect is difficult to detect due to the extreme distances involved.

6 iron swing speed of 86 miles per hour what flex shaft should you be using?

that is the perfect swing speed for the standard stiff shafted club. try the dynamic gold s300 shaft or the project x 5.5 or 6. the kbs tour stiff is good as well.

If traffic is faster than the speed limit resist going the speed of?

It is important to obey the speed limit for safety and avoid getting a ticket. If traffic is moving faster than the speed limit, it is best to stay at or below the speed limit and let others pass if necessary. Your safety and following traffic laws should be a priority.

What happens to speed of light when travel through plastic?

When light travels through anything that is not a vacuum, it will usually slow down.

Why an empty test tube placed in water in a beaker with mouth outside the water surface shines like a mirror when seen at certain angle?

the test tube has air inside it.In the outer surface of the test tube is water.Due to the different media across the test tube surface the reflection of light occurs through the glass surface.Hence the test tube shines(behaves)like a mirror

Does convection or conduction travel at the speed of light?

No. The speeds of convection and conduction vary, but they are nowhere near the speed of light.

Is speed of light is same in all optic media?

No, the speed of light is not the same in all optical media. It changes depending on the medium through which light is traveling, such as air, water, or glass. The speed of light is slower in denser media compared to a vacuum, where it travels at its maximum speed.

How long does it take to travel 1 lightyear?

Just like any other trip, it depends on how fast you travel.

-- Walking, 3 miles per hour . . . 223.5 million years

-- Driving, 60 mph . . . 11.2 million years

-- Flying, 750 mph . . . 894 thousand years

-- Earth's orbital speed around the sun . . . 10 thousand years

-- Speed of light . . . 1 year

Speed of red light and blue light in a vacuum?

In a vacuum the speed of red and blue light are the same as all light, 300,000,000m/s. Their frequency and wavelength will be different but the speed remains the same.

What propels light to the speed of light?

Nothing propels it at all. It actually always goes that fast, even from its creation. To explain it to you mathematically would require the use of 4-D tensor products, so I won't bother with that here. Suffice it to say, that is one of the postulates of Einstein's general relativity. Light always travels at the same speed in any reference frame.

Why the stop lights on a Nissan altima 1993 stay on all the time?

There could be a few reasons why the stop lights on a Nissan Altima 1993 are staying on all the time. It could be due to a faulty brake light switch, a short circuit in the wiring, or a problem with the brake pedal sensor. It is recommended to have the vehicle inspected by a mechanic to diagnose and fix the issue.

What of the following statements about the speed of light is true?

nothing can move faster than the speed of light in a vacuum APEXXX

How long It would take to travel 1 light year a)speed of light b)3000km per second with a space rocket c) 0.010 km per second running?


That would depend on who is doing the counting. A NASA flight manager
waiting for the ship to arrive would count a different length of time compared
to a passenger on the spacecraft.

Where is the speed of light at its fastest?

The speed of light is fastest in a vacuum. All other media slow the speed of light down, albeit very slightly.

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.