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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.

500 Questions

If flying at light speed for an Eon is it possible to go beyond the universe?

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Asked by Mapp

Traveling at light speed for an eon would not allow you to go beyond the universe since the universe is infinite in size. The concept of going "beyond" the universe is not well-defined since the universe is everything that exists. Additionally, traveling at the speed of light is not possible for massive objects according to the principles of special relativity.

What is the difference between refraction and reflection?

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Asked by Wiki User

Refraction occurs when light changes speed and direction as it passes from one medium to another, such as from air to water. Reflection, on the other hand, is when light bounces off the surface of a material, like a mirror, and changes direction. Refraction involves a change in speed and direction, while reflection involves a change in direction only.

According to the Theory of Relativity the closer an object gets to the speed of light the slower it goes so why does light which travels at the speed of light travel at all?

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Asked by Lightwaver

Light does not experience time or speed in the same way that objects with mass do because it has no mass. It travels at the speed of light by definition, as it is a fundamental property of electromagnetic radiation. In a vacuum, light always moves at the same speed and does not slow down or speed up.

Would a lighter go faster than a truck?

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Asked by Wiki User

No, a lighter would not go faster than a truck because a lighter does not have an engine or the ability to move on its own. Trucks are designed to move at higher speeds due to their powerful engines and larger size.

How long would it take to get from earth to Saturn traveling at the speed of light?

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Asked by Wiki User

It takes light approximately 1 hour and 24 minutes to travel from Earth to Saturn, as Saturn is about 1.5 billion kilometers away from Earth on average. Therefore, traveling at the speed of light (299,792 kilometers per second), it would take around 1 hour and 24 minutes to reach Saturn.

Are 12 volt lights cheaper to run than 240 volt lights?

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Asked by Wiki User

Yes, 12 volt lights are generally cheaper to run than 240 volt lights because they require less energy to operate. However, the initial cost of setting up a 12 volt lighting system may be higher due to the need for a transformer and special low-voltage fixtures.

Yz250f top speed?

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Asked by Wiki User

The Yamaha YZ250F has a top speed of around 80-85 mph, depending on various factors such as rider weight, terrain, and modifications to the bike. It is a high-performance dirt bike designed for motocross and off-road racing, where acceleration and agility are more important than top speed.

What is better at killing game light loads at hyper fast speed or heavier loads at slow speeds?

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Asked by Wiki User

Light loads at hyper fast speeds are generally better at killing game because they deliver higher velocity and energy upon impact, causing more damage to the target. Heavier loads at slow speeds may not penetrate as effectively or create as much tissue damage.

What voltage is needed to accelerate electrons to 1.5 times the speed of light in a CRT?

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Asked by Wiki User

To accelerate electrons to 1.5 times the speed of light in a CRT, you would need a high voltage of approximately 1.21 x 10^7 V (12.1 MV) in the electron gun section. This high voltage is necessary to impart enough kinetic energy to the electrons to reach such high speeds.

Does light travel in a straight line?

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Asked by Wiki User

Yes, light generally travels in a straight line in a uniform medium like air or a vacuum. This is known as rectilinear propagation. However, light can bend or refract when it passes through different mediums with varying densities.

How light travels?

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Asked by Wiki User

Light travels in the form of electromagnetic waves. These waves do not require a medium to travel through and can propagate in a vacuum. Light travels at a speed of about 186,282 miles per second in a vacuum.

Does the kaliedoscope use reflection or refraction?

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Asked by Wiki User

A kaleidoscope uses reflection of light to create its colorful patterns. The light reflects off the mirrors inside the kaleidoscope, creating multiple reflections that form intricate and symmetrical designs.

What is the uncertainty in the measurement for the speed of light?

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Asked by Wiki User

The uncertainty in the measurement of the speed of light is typically around ±0.3 meters per second. This uncertainty arises from various factors such as experimental errors, instrumental limitations, and environmental conditions. Multiple measurements and techniques are used to reduce this uncertainty and obtain a more accurate value for the speed of light.

Can the speed of light be legislated?

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Asked by Wiki User

No, the speed of light is a fundamental constant in physics and cannot be changed by legislation. Laws and regulations cannot alter the fundamental laws of nature.

When the speed of light changes the frequencywavelegnth changes?

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Asked by Wiki User

When the speed of light changes in a medium, its frequency remains constant, while its wavelength changes. This is due to the relationship between the speed, frequency, and wavelength of light, which is defined by the equation speed = frequency x wavelength. So, if the speed decreases, the wavelength will decrease proportionally.

Speed of a galleon?

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Asked by Wiki User

The speed of a galleon would typically range from 5 to 8 knots (5.75 to 9.2 mph or 9.26 to 14.82 km/h).

At what speed does a tornado travel?

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Asked by Wiki User

I don't have the paper in front of me, so this is just off the top of my head, but it seems to me that I've read
that the highest wind speed ever officially recorded was 234 miles per hour, at the weather observatory on
Mt. Washington in New Hampshire.

I read it in the hotel's local information booklet the night before I was scheduled to go up and work on
one of the microwave radio sites on Mt. Washington. I was really looking forward to it, but something
came up and I didn't go. Maybe some day.

What is the speed of darkness?

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Asked by WriteClub

Darkness doesn't have a speed. What you are seeing is the light leaving.

You could say it's the same as the speed of light but it's really just your perception that darkness is moving but it's really the absence of light.

On a car why are headlight washers needed when you have xeon lights?

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Asked by Wiki User

Headlight washers are needed for cars equipped with xenon lights because xenon lights produce a significant amount of heat, which can cause dirt and debris to accumulate on the headlights. The washers help to keep the headlights clean and maintain optimal performance of the xenon lights.

What clubhead speed to get 250 yards?

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Asked by Wiki User

There isn't a completely simple answer to this question, but I'll try and give you some 'rules of thumb'. As I'm sure you are well aware, the distance a golf ball carries depends on quite a few factors, e.g.: a) atmospheric conditions b) clubhead speed at impact c) how close to the so-called 'sweet spot', on the clubface, the initial contact with the ball is, at impact d) the nature and characteristics of the golf ball and driver in use, which in turn depend on the manufacturer and model. Some balls, and some drivers, produce a more 'lively' impact than others, so that the ball leaves the clubface at a higher speed, even at constant clubhead speed. Also the ball spin characteristics are a variable and again this affects distance. However, having said all of that, here are some ROUGH guideline figures: With a typical, 'middle of the range' modern driver, with a loft of about 10 or 11 degrees, and a 'middle of the range' ball: 90 mph clubhead speed will typically produce about 200 yards of CARRY (not total distance) 100 mph -----------------------------"-----------------------225 110 mph -----------------------------"------------------------250 Now, there are some important things to remember about those numbers: 1) The figures assume a clubface SQUARE TO THE TARGET at impact and 2) The direction of the clubhead is STRAIGHT THROUGH TO THE TARGET at the instant of impact. and 3) The clubface contacts the ball AT THE 'SWEET SPOT' on the clubface. An important thing about point number 3 above is that, as another rule of thumb, for every quarter inch (6.3mm) away from the sweet spot the contact is, you will lose about 5% of distance. Many ordinary golfers, for much of the time, are half an inch or more off the sweet spot. So that's 10%, which equates to 20 yards on a 200 yard drive - quite a lot!! All this underlines the need for golfers to learn to hit the ball BETTER, rather than just trying to hit it harder. Now the above figures are CARRY, not total distance. The extra bit of distance is of course the 'bounce and roll' and this varies enormously when using a driver. On very soft ground you'll get virtually nil bounce and roll, but on hard, dry ground you might get 50 yards or maybe more. Under 'average' ground conditions, you can reckon on bounce and roll being about 10% of the carry distance. What I've said above is by no means an exhaustive explanation of the factors affecting distance, but it's a start. In conclusion, using the figures I've provided, you can deduce that you might expect a 250 yard drive with average modern equipment from a clubhead speed of just over 100 mph, assuming that bounce and roll is 10% of the carry distance, and assuming good, precise, square impact.

How does glass help you see things from a distance?

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Asked by Wiki User

Glass acts as a transparent barrier that bends and refracts light rays, allowing them to converge or diverge in a way that allows us to see objects more clearly. This process helps focus light onto the retina of the eye, enabling us to see distant objects with greater clarity.

If something has low mass would it take less energy to get it to light speed?

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Asked by Dipit

Yes, according to the theory of relativity, as mass approaches zero, the energy required to accelerate an object to the speed of light also approaches zero. This is why photons, which have zero rest mass, can travel at the speed of light.

What could cause a 2001 Oldsmobile Alero GL to fluctuate in RPMs during light acceleration between the speeds of 40-55mph?

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Asked by Infan51

Fluctuating RPMs during light acceleration between 40-55mph in a 2001 Oldsmobile Alero GL could be caused by issues with the fuel delivery system such as a clogged fuel filter or faulty fuel injectors. It could also be due to a vacuum leak or a problem with the throttle position sensor. It is recommended to have a mechanic inspect and diagnose the issue for proper resolution.

What is the rubber material between the decking and coping called and where can you get some repair material of the same?

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Asked by Wiki User

The rubber material between decking and coping is commonly known as pool sealant or pool caulk. It serves as a waterproof barrier to prevent water from seeping underneath the pool coping. You can find pool sealant or caulk at local pool supply stores, hardware stores, or online retailers that specialize in pool maintenance products.