Some electromagnetic waves are invisible and some aren't. Light is electromagnetic radiation, and we can see it. Radio waves aren't, and neither are x-rays or cosmic rays. All of these are electromagnetic waves.
The definition for being invisible is not to be able to see something by ordinary means...for example...
air exists but can not be seen...
so, yes electricity is invisible...but
it is made up of electrons and magnetism, which scientists can see!
Usually when one says light waves, one is referring to Visible light.
Any light wave, and hence visible light, is an electromagnetic wave.
As an electromagnetic wave, it is also a transverse wave. The oscillating electric and magnetic fields of an electromagnetic wave in free space are oscillating with a direction perpendicular yo the direction of movement of the wave.
The velocity of an electromagnetic wave is the sped of light. This is a sensible things since light is an electromagnetic wave. In a vacuum all electromagnetic waves travel at the same speed. In matter, if the matter allows an electromagnetic wave to propagate, the speed is slower than the speed of light and in optics we say the speed is reduce by the index of refraction, v=c/n.
Electromagnetic waves, like all waves, have velocity, wavelength, frequency, amplitude and phase. As with all transverse waves, electromagnetic waves can be polarized, or we say, have a polarization.
Electromagnetic waves have electric and magnetic fields that are sinusoidal in space and time. These electromagnetic fields satisfy Maxwell's equations, i.e. the fundamental laws of electromagnetism.
There is a quantum version of electromagnetic theory called electrodynamics and that theory is the necessary edification of Maxwell's equations to describe the quantum nature of light. Thus, even when we are discussing light as photons, it is correct to say light is an electromagnetic wave as such is manifested within quantum electrodynamics.
Yes. The 'visible' wavelengths are the only ones that your eyes respond to.
At other wavelengths, even if they do enter your eyes, you don't know it.
That's why microwave and intense ultraviolet can be dangerous.
Visible light IS electromagnetic waves whose wavelengths
are within the small range that eyes can detect.
Not unless you can see radio waves, microwaves, cellphone signals, heat waves,
ultraviolet (blacklight) waves, GPS waves, police radar waves, X-rays, etc.
yes
the light spectrum
Well, seeing as it seperates visible light, it follows that it only seperates that visible light into the visible spectrum. You can't make radiowaves or UV rays out of visible light.
The color spectrum is part of the electromagnetic spectrum. The color spectrum, often referred to as 'visible light' is only part of it. It is called visible light because it is the only spectrum that we can see with our eyes (we can't see x-rays, radiowaves, etc). The colors within it come in the order of ROYGBIV : Red, Orange, Yellow, Green, Blue, Indigo, Violet.
Visible light is a very small part of the EM spectrum and it is intellectual laziness to refer to all EM radiation as light.
Astronomers study as much of the spectrum of radiation as they can, and the visible spectrum is only a small segment of it.
only the ones that have the names of colors
the light spectrum
False. People can only see the Visible Light spectrum, which is only a small section of the overall light spectrum.
No. We can only see visible light, which is only a small portion of the electromagnetic spectrum.
No
the range of the spectrum that's known as "visible light"
Well, seeing as it seperates visible light, it follows that it only seperates that visible light into the visible spectrum. You can't make radiowaves or UV rays out of visible light.
Only a small piece of the light spectrum is visible to us.
In her performance, she covered a wide spectrum of dance styles. Photosynthesis uses only a portion of the light spectrum.
The visible light spectrum is the only part of the spectrum that we can perceive with our eyes. It is commonly considered to be the 400nm -700 nm region. It lies between ultraviolet and Infrared region of the light spectrum.
only the color white
The difference between continuous spectrum and the atomic emission espectrum of an element is that in emission spectrum, only certain specific frequencies of light are emitted while in a continuous spectrum, a continuous range of colors are seen in the visible light.