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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 do you increase sunlight intensity?
A lens can be used to concentrate light. A group of mirrors aimed at the same location as they track the Sun would increase its' intensity. Upto 7000 degrees.
How to fix your 94 tracer that easily dies at idle speed on Parking or at red light?
Check the MAFS (mass airflow sensor) It's the silver-ish thing located right after the airbox (in front of the battery). If something is clogging it or if it somehow became disconnected or damaged, the car won't idle. On top of that, the car should not run well with a damaged MAFS at all, but, the most trouble will definetly be at idle. ~PorkPoney
A very basic model where we can assume there is no momentum loss during the collision... we need to calculate momentum, p.
p = mv
where m = 1 kg (the mass of the cart) and v = 0.5 m/s (velocity of the cart)
p = 1 kg . 0.5 m/s = 0.5 kg.m/s
After the collision the momentum will be the same, but the mass has doubled...
so p = mv = 0.5 kg.m/s = (1 kg + 1 kg).v
v = 0.5 kg.m/s / 2 kg = 0.25 m/s
What is the orbital speed of planets in miles per second?
It varies: The planets closer to the Sun move faster (Kepler's Third Law). Mercury is fastest; according to Wikipedia, its average orbital speed is 47.87 km/s. Multiply that by 0.6 to get the approximate speed in miles per second.
How does light travle in a material with a higher index of refraction?
It will usually change. Usually you would expect the speed to decrease, but note that the "optical density", i.e. the index of refraction, is not entirely related to the density (as defined by mass/volume).
What part of the day shadows are longest?
At dawn and dusk, your shadows extend all the way to the horizon.
How does the speed light being limited effect a two or three mass barycentre orbits?
You must calculate using the speed of gravity as instantaneous otherwise a balanced moving mass system is no longer balanced and is out of alignment.
How does the angle of incidence compare with the angle of refraction?
The angle of incidence, i, is the angle that the incident ray makes with the normal line. The angle of refraction, r, on the other hand, is the angle that the refracted ray makes with the normal line. The relationship between them is
a sine i = b sine r
where a and b are the constants known as the refractive indices of the respective media. They are more commonly represented as n(subscript 1) and n(subscript 2) but this interface won't let me do subscripts!
What happens if you step outside of a spaceship traveling at light speed?
Well first of all, you don't. No object that has any mass when it's sitting still will ever
travel at light speed.
To answer your question in general: If you're sitting inside a spaceship, sipping a cup
of coffee and surfing the web, and you decide to take a break from your back-breaking
labor and step outside for a few minutes, then the moment you're outside, you continue
traveling at the same speed and in the same direction that the ship was when you let go
of it.
If the ship is traveling with constant velocity ... constant speed in a straight line ... then
you seem to float motionless next to it, because your speed and direction are exactly
the same as the spaceship's. If the ship is accelerating, then you keep the speed and
direction that you and it had when you let go, and the ship goes on its own merry way,
leaving you behind, beside, or ahead.
How long would it take light to travel 2000 miles?
Less than the blink of an eye; about 0.0107 second.
What is the frequency of color?
Every color has a different frequency. That's why
it appears to our eyes as a different color.
If you see anything that appears to be moving, then you know that relative to
that thing, you're moving. That's the best and only thing you can do, because
there is no such thing as 'really' moving ... only moving relative to something.
What is the frequency of monochromatic light of wavelength 485 mm when the speed of light is 3.00?
The answer depends on the units in which the speed of light is given as 3.00
What is a device that produces ticking sounds or flashes of light at any desired musical speed?
A metronome is a device that produces ticking sounds at various speeds to help musicians keep time while playing music. It can be set to different tempos to match the desired speed of the music being played.
What happens to momentum in an inelastic collision?
Momentum of the system is conserved.Keep in mind kinetic energy of the system is not conserved
What dimension is the speed of light?
The speed of light is a physical constant that does not have a dimension in the SI system of units. It is denoted by the symbol 'c' and has a fixed value of approximately 299,792,458 meters per second in a vacuum.
Who discovered that the speed of light is constant?
James Clerk Maxwell, the English physicist and mathematician, working with results
published by Faraday and Coulomb and Gauss and Ampere and all the other scientists
before him who worked on electricity, put all of their work together, and discovered
(mostly with math) that all of this electric and magnetic stuff should produce waves
that can travel through empty space and carry energy from one place to another.
Other smart people thought that was all very interesting, but if these waves existed,
then what would they look like ? What would they sound like ? What would they
feel like ? What would they smell like ? How would you know if there were any of
these mysterious waves around you ?
From Maxwell's math, he was able to tell what the speed of these waves would be
if they existed. It was a very high speed, and very tough to measure, but as years
went on and experimental technology got better and Physicists got smarter, a lot of
scientists made better and better measurements of the speed of light. And the more
accurate their measurements got, the closer and closer their numbers came to the
speed of these mysterious "electromagnetic" waves from Maxwell's equations.
It finally became obvious that these waves are all around us, and that light is
a form of them. Could they also exist in other forms ? What do you think ?
Will light speed travel be possible in our lifetime?
It is currently not possible to travel at the speed of light according to our current understanding of physics. Developing technology to allow for light speed travel would require major breakthroughs in propulsion systems, energy sources, and materials. While advancements continue to be made in space exploration, it is uncertain if such technology will be achievable in our lifetime.
Which are the rays traveling in speed of light?
All electromagnetic radiation does. We have different names for it, depending on
its wavelength. The names include radio, microwave, heat, infrared, visible light,
ultraviolet, X-ray, gamma-ray.
What is the speed of light through a solid?
The speed of light through a solid will depend on its refractive index. Water ice has a refractive index (RI) of 1.31 and so light will travel at a speed of 228,850,000 metres per second. Germanium has a RI approx 4 and so the speed of light is 74,950,000 metres per second. Then there are opaque solids and the speed of light through these is 0.
When will an eletromagnetic wave travel slower than the speed of light?
Light is an electromagnetic wave.
All types of electromagnetic wave travel at the same speed,
as long as they're traveling through the same stuff.
The speed is 299,792,458 meters per second in vacuum, and
somewhat slower in any material. The exact speed depends
on the material, and it's different for every material.
