Why can we not see radio waves?
536401
They are too long too see
905686
In radio.  Not real noise that you can hear, as northern lights are electrophysical interaction between the upper atmosphere and the solar wind, and the atoms there get ionized.\nThis activity releases radio waves that can impede radio communications, and the static can be heard on a radio.  But you do need a radio to hear that noise.
328870
From your question, I understand that you are needed some review of concepts about light.\n\nLight is not a matter to ‘see’.  It is energy.  We can perceive its presence through our eye.\n\nTherefore, whether speed of energy with which it is transmitted from one object to another is high or low, we cannot “see” it.\n\nIf an object completely stops the light; its speed is zero; in a sense, the energy is resting there, no energy reaches our eye, we cannot perceive the object.\n\n Some objects look black, because no light is coming from the object. It means the light is entering into the object. What happens to that light? Inside the medium its velocity is reduced.   Depending upon the nature of the medium the energy of light may be absorbed in which case there is no light inside the medium. If not absorbed definitely it will come out of the medium.  In any case we cannot “see” the light.\n\n The refractive index of a medium is the ratio of the speed of light in air to the speed of light in the medium. The speed of light is 3E (8) m/s.\n\nThe maximum refractive index is ~ 4.  Thus there is no material which can reduce the speed by one-fourth of its present speed. \n\n Finally whatever its speed we cannot visualize the motion of light as it is energy and it is not matter.\n\nNowadays every one is familiar with radio, T. V, cell phone, internet connection to computers.\n\nThese are all working using electro magnetic rays of different frequencies like light wave.\n\nThough we are not able to perceive these rays with our eye, we are using them. The light rays are perceived by our eye. It is the only difference between the rays.
749920
Yes, that's why.  The first answerer is correct, too--we can't make a lens powerful enough to see an atom--but the reason why we can't is that the wavelength of visible light is larger than an atom.
726904
Nearly all objects in the universe emit, reflect and/or transmit some light. (One hypothetical exception may be dark matter.) \n\nA rainbow shows the optical (visible) part of the electromagnetic spectrum.. Sun and stars too ..\n\nEarth emits Infrared waves .. and so our bodies ..\n\nThe Sun emits a large amount of UV radiation , infrared rdiations and others ..\n\nNeutron stars and accretion disks around black holes emit X-rays, which enable us to study them.\n\nTelevision, mobile phones, wireless networking and amateur radio all use radio waves.
547652
I asked my self the same question when I was 12 years old. I like to believe it. It was a nice idea; and then I imagine even bigger things (with the same concept) and smaller ones. But now I know it`s not possible (with the physics laws in our universe). For instance, you can not see nothing, since the diameter of the biggest atom is smaller than the lowest visible wave light. (that`s why we will never be able to see an atom, even with the best microscope ever)
854524
Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna
286886
Would you believe, yes?\n\nI worked at a steel mill, with our base station radio sitting on the desk next to me.  This radio had a little metal 6" antenna sitting on top of it...\n\nNow, if you were not transmitting, you could touch the antenna with no problem.  When you transmitted, there was enough RF coming out of that little thing that if you held your hand close to the antenna - not even touching it - you would feel a 'buzzing'...  Similar to an electric current, but not quite...\n\nI've no idea how much wattage was being put out, but it was a little base station...  Increase that significantly, and I'm sure you could shock the tar out of someone...\n\nBeing said, consider that RF waves ARE electrical waves, at least in part.  Yes, I know they are part of the electromagnetic spectrum which does include visible light, but why do you suppose it's called the electromagnetic spectrum?\n\nThe Tesla coils mentioned earlier are RF generators (or rather, can be, with tuning...)
776408
Hi Scarlett,\n\nFirst of all, visible light waves consist of a continuous range of wavelengths or frequencies. When a light wave with a single frequency strikes an object, a number of things could happen. The light wave could be absorbed by the object, in which case its energy is converted to heat; the light wave could be reflected by the object; and the light wave could be transmitted by the object. Rarely however does just a single frequency of light strike an object. While it does happen, it is more usual that light of many frequencies or even all frequencies are incident towards the surface of objects. When this occurs, objects have a tendency to selectively absorb, reflect or transmit light of certain frequencies. That is, one object might reflect green light while absorbing all other frequencies of visible light. Another object might selectively transmit blue light while absorbing all other frequencies of visible light. The manner in which visible light interacts with an object is dependent upon the frequency of the light and the nature of the atoms of the object.\n\n"White" or natural light is made up of different colours (as in a rainbow) and Isaac Newton showed that these could be shown by shining white light through a prism.\n\nWhat "colour" we see an object depends on what wavelength of light it does not absorb and that depends on what the chemistry of the object is. This is because the electrons in a substance will vibrate at a certain frequency depending on what the construction (i.e. what the chemistry) of the atom is. Accordingly this will either absorb (interfere) or coincide with the wavelength of a particular colour.\n\nThus we will always see different chemicals as different colours (ie. wavelengths).
226364
Unless you live within line of sight of the transmitter, radio waves usually bounce off the Ionosphere (that's in the sky) to reach your house. The Ionosphere is ionized by charged particles from the sun. Changes in the level of ionization may affect the the strength of the signal which is reflected to your radio.\n\nSo, \nblame it on the sunshine, \ndon't blame it on the moonlight, \nblame it on the ionosphere,\nthat your radio won't boogie!
317297
Yes, you would be able to hear it fine.  The radio waves travel at the speed of light.  This is many thousands of times faster than the speed of sound in air.  Your radio would be wholly unaffected in any way.\n\nYou would not, however, be able to hear a direct sound from someone talking to you and standing still.  The sound waves from their mouth are travelling at the speed of sound.  But the information carried by radio waves is not converted into sound waves until it gets to your receiver.
869017
Sound waves can be heared but cannot be seen, only light and colors are seen. We can only see the motions, oscillations and vibrations on the objects caused by sound waves.♥\n\nCheck out these links:\nhttp://www.du.edu/~jcalvert/waves/soundwav.htm\nhttp://www.glenbrook.k12.il.us/gbssci/phys/Class/sound/u11l1a.html\nhttp://www.du.edu/~jcalvert/waves/soundwav.htm
461697
Depends on what sort of electromagnetic waves you mean...\n\nMicrowaves, X-rays etc\n\nStudies are being conducted all the time to test this, but most electromagnetic radiation found in the home has to have been judged safe by govermental bodies, otherwise it wouldn't be sold!!\n\nJust be wary of getting too close to microwaves if you have a heart pacemaker.
1169047
good grief - there is a lot of 'part' knowledge here...\n\nyou need to break this down and talk about the different parts of what the original question was asking.\n\nif it was 'see', the explanation would be the same as for hearing by the way. (it would be easier to explain about seeing)\n\nhere goes...\n\ninside your ear you have these little hairs (cillia) that are a certain distance apart. when a sound wave enters the ear the wavelength of this wave will stimulate hairs at both its high energy points (its troughs or peaks, you choose, not important) your brain knows the distance of the hairs and so can interprut this wave distance between two lots of hairs being stimulated. thats how you get the frequency (number of wavelengths in a second) of sound in your ear. the volume (loudness) depends on how vigourously the hairs are moved by the sound wave. (thats why you can go deaf listening to loud music - you kill those little hairs if too loud). \n\nnotice i said sound!\n\nyour question is about electromagnetic waves. radio waves and visible light (green) waves are both of the same stuff (light energy - some we can see and some we cannot). the organ for detecting this energy is the eye. inside the eye, the retina (back of the eye) has special cells called rods and cones for detecting different wavelengths (i believe this is what your engineer was on about). each of these cells has a specific chemical for detecting a certain wavelength. lets pick on one.\n\nthe red light cone has a protein inside that has a special part that can move to a slightly higher energy form (a more awkward position for the proten so it wants to get back to where it was before - think of bending a ruler... the more you bend it, the more it wants to get back to where it was... so the higher the energy it has) when red light is shone on that protein (inside the eye) it provides enough energy to move this extra part of the protein (called an apoprotein portion is anyone wants to know) to a higher energy state and this is enough to induce (make happen) a signal being sent to the brain that says 'red light detected' and we see red light.\n\na similar thing happens to green light.\n\nin physics, when we talk of waves whether in music or lihgth or nanometers, if you have something of the same wavelength then it is detected as the same.\n\nif you have something of a different wavelngth then it is detect as different ( or in the case of the eye.. or even the ear, not detected at all, unless your are green, red or blue light)\n\nbut if you have a wavelength that is say  x2 bigger, of x3 or x6 or x2000 times bigger exactly, with no extra and no bits needed.. it has to be exact. then these also will be detected.. A BIT. we call thesse harmonics. this is a word that belongs to music.\n\never notice the way a piano has all those notes (only 8 notes and yet so many keys..?) these eight notes are repeated but in higher registers/keys, but they are still the same note.... a higher harmonic. all these wavelenths are doubled or trippled or what ever.\n\nso, because there will be a harmonic of green light in the radiowave part of the spectrum... it can theoretically be detected. so you could theoretically detect green light (with the eye) and radiowaves (theoretically with the eye)... but never with the ear :-)\n\nhappy days - now lets look at information theory! why do we always lose information and yet still maintain the integroty of the message? at what point is the message lost?
362672
Radiowaves, look it up.\nAnd you definately got the category wrong.
877594
you've got x-ray's and gamma rays (more energetic than x-rays) from outer space\n\nyou've got some particles from outer space (and you've got neutrinos, though these barely interact w matter so although we're exposed to them, it's of no consequence)\n\nwithin the electromagnetic spectrum, we're exposed to radio waves, television waves, mobile phone signals, electro-magnectic waves from alternating current in wires in our homes / offices, and to visible light (but you said not to count the sun)\n\nthen we're exposed to various forms of radioactivity (x-rays, gamma rays, electrons, alpha particles) from various radioactive isotopes found in nature. One common one, especially in mountainous regions, is radon, a gas.\n\n\nI realise this is more than 2 sentences but I wanted to give you enough material to chose from! ;-)
509957
Electromagnetic radiations or waves are propagating in space. Electromagnetic waves have electric and magnetic components, the electric field and the magnetic field oscillate at right angles to each other and to the direction of propagation.\nAs any other waves e.m. waves are characterized with  frequency (number of vibrations in one second), wavelenght (the distance from one crest to the next crest in the sinus wave) and radiant energy. \nThe range of the e.m. waves is called the electromagnetic spectrum. The highest frecvency and energy / the lowest wavelenght e.m. radiations are gamma rays (are shorter than the size of the nucleus in the atom) then X rays, ultraviolet radiations, visible light, infrared radiation (heat radiation), microwaves, and radiowaves which has the lowest frequency and longest wavelenght (can be several km long). We can see only the visible light, the other e.m. radiations are invisible to us. But they can have an effect on our organism. They have a lot of technical, medical and other use.\n\nfor more see >>\nhttp://en.wikipedia.org/wiki/Electromagnetic_radiation