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Why is the velocity of electromagnetic waves not measured?
The question is not quite clear. The speed of electromagnetic waves has been measured, in a great number of experiments of increasing precision and accuracy over the past 150 years, and is now known correctly to within 5 parts per billion.
What can electromagnetic waves can transfer energy without a medium or electric field?
Electromagnetic waves can carry energy from place to place without a medium. Further, any frequency of radiation from a mass transfers energy in the form of waves. As to whether it is with or without a medium is yet unknown and yet to be experimentally proved or disproved.
How is electrical energy transferred to light energy?
Electrical energy is transferred to light energy through a process called electroluminescence in which electricity passes through a material that emits photons, producing light. This is commonly observed in light bulbs, LEDs, and fluorescent lamps where electrical energy is converted into visible light energy.
Which waves travel faster a seismic wave or radio wave?
Seismic waves depend on what kind of material of ground they travel on because not all seismic waves can travel in liquid or solid grounds, so earthquakes might not be that distructive. But earthquakes still depend on the friction, faults and other stuff. Seismic waves play a big role in an earthquake because it carries the energy away from the focus, and onto the earthquake. But the seismic waves don't stay in an earthquake, they go through Earth's interior and carry the energy across the surface. But the people near the earthquake won't feel it as much as the epople who are near the earthquake.
Which model of light states that light travels in a series of waves?
The wave theory of light is the idea, supported by a number of scientists over the years, that light behaves as waves. It has been superseded by Quantum theory, which says (in part) that light sometimes behaves like a particle and sometimes like a wave.
Where do light years fit on the electromagnetic spectrum?
They don't. A 'light year' isn't anything as romantic as an electromagnetic wave or a gamma ray. A 'light year' is nothing but a lowly unit of length or distance, just like an inch, a mile, or a kilometer. A 'light year' is the distance light travels in a year. That's roughly 5,878,700,000,000 miles. (You can see why it's easier to use 'lights years' than miles to talk about long distances.)
Are radio waves the shiortest wavelength of all EM waves?
Radio waves have almost the lowest frequency of any electromagnetic wave, but as the frequency, f, is related to the wavelength, l , and the speed of light, c, by the equation:f=c/lthis means that they have one of the longest wavelengths of all electromagnetic waves.On most illustrations of the electromagnetic spectrum, you will see Radio waves shown as the lowest frequencies of all. In fact, there are lower frequencies called ELF (extremely low frequency) waves. The most commonly encountered ELF waves are those that result from 50/60Hz electricity power lines, with wavelengths of some 6000km.In principle, though, there is no reason to suppose that there is a longest possible wavelength wave on the electromagnetic spectrum - electromagnetic waves may exist that have wavelengths of the order of light years, for example.
How long would it take a radio signal to reach a star that is eleven light years away?
A radio signal would take eleven years to reach a star that is eleven light years away. This is because the speed of light is the fastest speed at which any form of information can travel through space.
How long will it take an electromagnetic wave to travel 700 light years from earth?
Electromagnetic radiation travels at the speed of light, so it would make the journey in 700 years.
Why is the velocity of electromagnetic waves not measured?
The question is not quite clear. The speed of electromagnetic waves has been measured, in a great number of experiments of increasing precision and accuracy over the past 150 years, and is now known correctly to within 5 parts per billion.
Where in space are the radio waves that were cast 100 years ago?
Radio waves travel at the speed of light, so radio waves broadcast 100 years ago that were strong enough to reach into space are 100 light-years away.
Why does the ultraviolet light coming from stars 13 billion years ago become infrared light when it reaches earth?
Its due to red shift - electromagnetic waves are shifted towards the red end of the EM spectrum. As the ultraviolet wavelength gets stretched it becomes infrared.
How did James maxwell discover that light wave is an electromagnetic wave?
He added an extra mathematical term to Ampere's law and discovered that with what are now called Maxwell's equations there is a free-space solutions in the form of waves. He found that the wave solutions travel at the speed of light, so he guessed that they were light. This was later proved to be correct. The equations also predicted the existence of radio waves and these were discovered 15 years later.
What can electromagnetic waves can transfer energy without a medium or electric field?
Electromagnetic waves can carry energy from place to place without a medium. Further, any frequency of radiation from a mass transfers energy in the form of waves. As to whether it is with or without a medium is yet unknown and yet to be experimentally proved or disproved.
The nearest star beyond the sun is Alpha Centauri which is 4.21016 meters away If you were to receive a radio message from this star today how long ago would it have been seen?
Actually the nearest star (except for the sun) is Proxima Centauri is next at 4.3 light-years from the Earth. It would take 3.4 years at one light-year/year for radio waves to reach Earth from there. This is because the radio waves are travelling in a vacuum and all electromagnetic wave in a vacuum travel at "C" AKA the speed of light.
Does a pure sine wave exist in nature or is it man made only?
All electromagnetic radiation - including light in space, cosmic microwaves, stellar x-rays are pure sine waves. They existed billions of years before man appeared in the universe!
How is electrical energy transferred to light energy?
Electrical energy is transferred to light energy through a process called electroluminescence in which electricity passes through a material that emits photons, producing light. This is commonly observed in light bulbs, LEDs, and fluorescent lamps where electrical energy is converted into visible light energy.
