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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

Does a photon obey the rules of something traveling at the speed of light?

Obeying PhotonsPhotons by definition travel at the speed of light. They are unaffected by mass dilation since they have no mass, but are affected by time dilation: a photon could conceivably travel "forever" from our point of view since no time would pass from a photon's reference frame. So yes, they follow the rules along with everything else.

What causes squeaking at low speeds coming from the tires that goes away as you increase the speed?

Squeaking noise coming from the tires at low speeds that goes away as you increase speed could be due to flat spots on the tires from sitting in one position for extended periods or a tire alignment issue causing uneven wear. It can also be due to inadequate lubrication of the suspension components or worn-out brake pads. Have it checked by a mechanic to determine the exact cause.

Have 2000 Ford Ranger why is speedometer 8-12 mph faster than acutual speed - have correct tires 22570-15?

u could change the speedo gear in the tail stock of the tranny, remove speed sensor, and they are colour coded, find one with 1 less tooth, you may have to go to a dealership to get them. with one less tooth, the speedo cable will turn just slightly slower, therefore compensating the 10 mph difference. ummmmm-k. Keith_sargent@hotmail.com if you have any more questions.

What else can be wrong if your engine light is blinking if its not the cluster or the speed sensor could it be the alternator your car died on the road a couple times Can anyone help you out?

a check engine light that flashes while driving has nothing to do with the speed sensor or alternator a flashing engine light shows that there is problem that is causing catylitic conver damage for instance if you had a bad spark plug or spark plug wire that was causing a missfire then the light will flash there is no other reason for the light to flash

Would an object shrink when traveling at the speed of light?

The object would probably disintegrate completely. The speed of light is 299,792,458 meters per second, that's fast enough to circle the globe at least 6 times. The force against the wind would have to be at least 500,000 pounds of pressure, and that's an underestimation. The object would most likely catch fire, as well.

If a car could travel at the speed of light would its headlights be of any use to the driver?

Yes, assuming a vessel prepared for travel at the light the headlight would work.

No. Assuming a car could travel at the speed of light, and assume the headlights were isolated to feed the electricity to the bulbs, and assuming the bulb lit up, the light would not project forward through space lighting the way in front of the car, as the light from the headlights would be travelling at the same speed as the car, so it would just be black in front, assuming this is travelling through outer space.

Why would your 98 Chevy S-10 vibrate only at speeds of 20-25 MPH but others speeds it does vibrate not no matter what gear your in?

Variety of possiblities. The first item I would check is the center support bearing. It is in about the middle of the truck and the drive shaft goes into it. The rubber begins to give out and the bearing is no longer supported well causing a vibration.

95 Mustang 50 with manual trans engine speeds up fast and slows down a couple times in row and check engine light flashes?

The symptoms you described could indicate misfiring in the engine cylinders. This could be caused by issues such as faulty spark plugs, a failing ignition coil, or a vacuum leak. It is recommended to have the vehicle diagnosed by a mechanic to determine the exact cause of the problem and address it accordingly. Driving with a flashing check engine light can potentially cause damage to the catalytic converter.

How do you get into newgrounds with a light speed blocker?

I myself have attempted various means to circumventing the software, and regret to inform you that proxy servers and other such programs and websites do not seem to work.

How do you stop the speed governor on a 2000 cavalier z24 5-speed manual?

It is not recommended to disable the speed governor on your vehicle as it can lead to unsafe driving conditions and potential damage to the engine. The speed governor is in place for safety reasons to prevent the vehicle from traveling at unsafe speeds.

If you were moving at the speed of light and looked behind you what would you see?

You cannot travel at the speed of light.

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Answer

If you were moving at the speed of light and looked behind you a few things could possibly happen. 1st after the flash of light that was traveling with you showing what was behind you all you would see is black, because no new light would reach your eyes 2nd you might see tiny pixles of colered light in a background of light, because light on a diagonal path comapaired to your would intercept your eyes at a certain point in time. I have heard some people say that you would see afrozen frame but I think after the light hits your eyes the energy in it is used.

A more interesting question may be what would happen if you went a little faster and looked ahead what would it look like as you cought up with light that was already moving?!

AlternateMost people know that accelerating to light speed is not possible, but we can consider the question as speculation, or as a kind of 'thought experiment' in order to illustrate some of the relativistic effects of travel at or near c. Have you ever seen a science fiction program/movie where the storytellers wanted you to get that time has stopped for a few people in the scene? People will be projected as if they are frozen in time; as if they are fixed in a kind of time-dependent plexi-glass. This isn't precisely what would happen to you if you accelerate to light speed (which is actually impossible) but it is reasonably close to what happens. [To observers on earth, you would look more like an infinitely thin pancake. Honest.] At the speed of light, all time would completely stop for you. It would not be possible for you to turn, or 'look', or 'do' anything at all. If you were a photon traveling through space toward earth for 10 million earth years, when you arrived it would seem to you that the trip was instantaneous.

You would"NT see anything as you will close your eyes when travelling at such a speed.

Do photons have mass and if not then how is it affected by gravity then why and how does it slow down when passing through a medium and then instantly accelerate back to light speed?

Part 1: General relativity has gravity act on photons not directly (as with objects with mass) but by bending the space&time around the object. The photons are unaffected. The path they take is curved, so they appear to bend. Sort of like how you can walk in a "straight line" on earth, but eventually appear where you started. Because the earth is curved, your path is curved, it has nothing to do with how much mass you have.

Now there is a way to describe reflection and refraction using only photons, and that process is described below by other posters:

The process of reflection/refraction is really a process of absorption/emission on a really small level. When electrons, say those of silicon atoms, are bombarded with photons, they absorb their energy, and, quite temporarily, the photon ceases to be observable as light.

The electron then immediately emits a photon in the opposite direction, producing the illusion of light moving more slowly; however, we know that the speed of light is constant in every possible scenario, even outside a vacuum. This just happens to be one of the strange consequences of the quantized state of matter at the sub-atomic level.

An atom is a system which wants to exist in its ground state. It does not want to absorb the energy of a photon and thus, it ejects the energy in the form of a photon (the energy difference as a result of the "collision" is manifested in a slight change in the wavelength/frequency of the emitted photon)

Very good answer above, for further information on electron reflection/diffraction, Richard Feynman has some excellent free video lectures on QED that were intended for the layperson.

Answer2:

Photons have mass and the concept of rest mass is false.

Daring to challenge General Relativity, Photon's have mass W = hf = pc = mcc, thus m=hf/c2= h/cw and thus is affected by gravity.

Einstein's Deflection 1.7" is the result Gravity tan D= .5gt2/150Gm = .5 x9.8 x150G/c2=8.16666E-6 ,

where t= 150Gm/c and g= 9,8 earth's gravity.

Answer 3: There is a reason why gamma, X-ray, Bharat Radiation, and light photons attract towards Earth. Both energy and matter constitute three components: electric, magnetic, and gravitational. In clear words, since photon's gravitational component facilitates attraction towards Earth.

Where is the regulator for the speed on a 2002 Ford Focus and how can you get it to go faster?

The speed regulator for a 2002 Ford Focus is typically located within the Engine Control Unit (ECU). Attempting to modify the speed regulator to make the car go faster is not recommended as it can void warranties, compromise safety, and may be illegal. If you are looking to increase the vehicle's speed, consider professional performance upgrades or enhancements.

How do you fix broken reverse lights on 1994 Chevrolet S-10 5 speed?

The most common problem is switch on side of transmission.(If bulbs and fuse are good)

Another common problem with reverse lights is a faulty ground.

Check for the black ground wire off the lights in the back. If the connection to the ground (body or frame) is rusted or broken repair it.

What does the sensor light on the dash panel of a 1995 Isuzu Rodeo 4x4 5 speed mean?

The sensor light on the dash panel of a 1995 Isuzu Rodeo 4x4 5 speed could indicate a variety of issues depending on the specific symbol or warning displayed. Consult the vehicle's manual for a detailed explanation of the warning light or have a mechanic diagnose the problem to determine the exact cause.

Does light travels at the same speed at all times?

Yes, as long as it's traveling through the same material. If it enters a
different material, like water, glass, jello etc., then its speed changes.

Why is the prefix micro used to describe microwaves?

The prefix "micro-" is used in microwaves to indicate that the wavelength of these waves is in the range of micrometers, also known as microwaves. The term microwaves distinguishes these electromagnetic waves from other types of waves, such as radio waves or infrared waves, based on their specific wavelength range.

What are the values of the speed of light?

the speed of light is 186,000 miles a second it takes the light from the sun takes 7 minuates and 59 seconds to reach earth if the sun explodes it wont be known until the light reaches the earth.

The first person to fly faster than the speed of light was?

No human has flown faster than the speed of light, as it is currently considered impossible based on our understanding of physics. The speed of light, approximately 299,792 kilometers per second, is the cosmic speed limit according to the theory of relativity.

Who was the first American to win thew Nobel Prize for measuring the speed of light?

The first American to win the Nobel Prize for measuring the speed of light was Albert A. Michelson in 1907. His precise measurements helped advance the understanding of the fundamental constant and its significance in physics.

What is the scientific notation of speed of light?

The scientific notation for the speed of light is 3.0 x 108 m/s, or, 3 x 105 km/s depending on the units you're using (meters or kilometers).

What is the refractive index for araldite CY 230 and HY 951?

Araldite has a index of refraction n-1.55 close to that of crown glass n-1.523

Could the human eye see the speed of light in space?

You can see the speed of light right now. Here's one way:

We know precisely and exactly when any moon of Jupiter should blink out as it

passes behind the planet. If we set our clock when Jupiter is near us, and then

watch the moons when Jupiter is on the other side of its orbit from us, we see

the moons blink out 30 or 40 minutes later than they should. That's the extra

time it takes the light from there to go the extra distace to reach us.

How much faster does the speed of light travel than a plane?

This question really depends on what type of plane you mean, I will answer Commercial planes for everyday people

The speed of light is approximately 186,000 miles a second or 669600000 mph / 299,792,458 meters per second.

A commercial plane like a 747 passenger plane that you might use to go on holiday travels at around 800mph. (top speed)

669600000mph (speed of light) - 800mph (average plane speed) = 669599200.

The speed light is roughly 669599200MPH faster.

According to relativity, the speed of light is precisely the speed of light faster than a plane, to the observers in the plane. The above answer is only correct for an outside observer in a particular reference frame.

Can you tell your eye refraction level from your contact prescription?

Yes, your contact prescription includes information about your eye refraction level. It indicates the amount of correction needed for your vision, measured in diopters, to bring your eyesight into focus. This information helps the optometrist or ophthalmologist determine the type and power of contact lenses you require.