How does sunspot and solar flare activity affect the Electromagnetic  (EM) Spectrum?
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A solar flare is a violent explosion in the Sun's atmosphere with an energy equivalent to tens of millions of hydrogen bombs. Solar flares take place in the solar corona and chromosphere, heating plasma to tens of millions of kelvins and accelerating the resulting electrons, protons and heavier ions to near the speed of light. They produce electromagnetic radiation across the electromagnetic spectrum at all wavelengths from long-wave radio to the shortest wavelength gamma rays. It is generally accepted that flares represent conversion of magnetic energy into kinetic energy of particles and radiation, via a process called magnetic reconnection. Most flares occur around sunspots, where intense magnetic fields emerge from the Sun's surface into the corona. The energy associated with solar flares may take several hours or even days to build up, but most flares take only a matter of minutes to release their energy.\n\nSolar flares release a cascade of high energy particles known as a proton storm. Protons can pass through the human body, doing biochemical damage. Most proton storms take two or more hours from the time of visual detection to reach Earth. A solar flare on January 20, 2005 released the highest concentration of protons ever directly measured, taking only 15 minutes after observation to reach Earth.\n\nThe number of sunspots correlates with the intensity of solar radiation.
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A good approximation to the distribution of electromagnetic radiation emitted by the sun is given by the equation for a blackbody with a temperature of 5780 Kelvin:\n\nPower (Watts/meter^2 surface are/meter wavelength) = \n  2*pi*h*c^2/L^5*(exp(h*c/L*k*T)-1)\n\nwhere\n\nh = Planck's constant (6.626 x 10^-34 Joule*sec)\nc = speed of light (2.998 x 10^8 meters/sec)\nL = wavelength (meters)\nk = Boltzmann's constant (1.38 x 10^-23 Joule/Kelvin)\nT = temperature (Kelvin)\n\nThe sun's power output peaks in the visible portion (around a wavelength of 500nm) of the electromagnetic spectrum, but it emits over the entire range of possible wavelengths.\n\nIn reality, the solar spectrum is much more complicated than a simple blackbody curve because of the absorption of specific frequencies by the atoms making up the sun, as well as temperature inhomogeneities and effects due to the sun's magnetic field.
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i would think that the radiation from the freqs listed above should all cause excite the water molecules in the same way but to differing extents. that's a very good question; i think i'll research it.
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How's the space weather today? Quiet enough for a safe trip to the moon? Quiet enough to operate your GPS navigation system accurately? So active that it would crash your power grid? Like our everyday weather, space weather can change suddenly, become violent, and interfere with our lives.\n\nSpace weather is driven by the sun. The solar wind, a plasma of protons and electrons, streams out of the sun and changes the shape of Earth's magnetic field.\n\nNear Earth's surface, this field is like the field of a giant bar magnet, as shown. \n\nFurther out in space, the streaming solar wind flattens the field towards the sun and forms a long tail pointing away from the sun, as shown. This region where the solar wind and magnetic field interact is called the magnetosphere.\n\nThe magnetosphere traps particles from the solar wind. This complex system responds strongly to changes in the sun's surface, especially to sunspots, which follow an eleven-year cycle. Sunspots can produce large solar flares, bursts of electromagnetic radiation, and outpourings of charged particles called "coronal mass ejections." Changes in space weather result, sometimes with devastating effect.\n\n    August, 1972: During the time of preparation for Apollo 17, a violent solar flare produced intense radiation that would have killed the astronauts had they been in space at that time\n\n    March, 1989:\n\n        * Vivid auroral displays extended as far south as Arizona\n        * Electric power was knocked out in the province of Quebec for nine hours\n\n    January, 1997: A communications satellite failed a few hours after a coronal mass ejection smashed into the magnetosphere.\n\nJust as with our ordinary weather here on Earth, physicists make measurements and build models to understand and predict space weather. Accurate predictions can help protect power and communications systems and enable astronauts to avoid dangerous conditions in space.\n\nNote: 1989, the year of the Quebec blackout, was a maximum in the eleven-year sunspot cycle. On the other hand, 1972, the year of the solar flare mentioned above, was near the sunspot minimum, but in fact flares can in fact occur at any time during the solar cycle.
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they cause electromagnetic stroms
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There are many types of electromagnetic radiation. Some we can see, which we call light. Some is lower frequency, like infrared radiation, which is the heat we feel from sunlight, or from a campfire or a stove. Some is higher frequency , like ultraviolet radiation, the radiation. Electromagnetic radiation can travel through space. It does not need any propagation medium to travel in.
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Light and radio signals are all the same thing, electromagnetic radiation. Radio waves are just very low frequency light and light is just very high frequency radio signals. All objects that are hotter than absolute zero give off some electromagnetic radiation. The really hot objects give off visible light. Cooler ones give off infra red light. Cooler still and you get radio emissions. The Earth's surface gives off radio waves because it is warm. In fact, it gives off so much that it is an interference for communication satellites trying to hear signals from the ground.\n\nModern radio astronomy uses giant antennas to focus radio waves, just like optical telescopes focus visible light. Computers are used to construct images of what the sky would look like if your eyes could see radio waves.
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The x-ray emission is a very small fraction of the total luminosity of the sun (most of which is in visible light). There is no a priori reason to assume that the x-ray production is closely related to the  bulk luminosity of the sun.\n\nIn fact, the bulk of the x-ray emission is not blackbody emission (the sun glowing because it is hot) at all. \n\nSolar x-rays are generated by magnetic reconnection events (aka solar magnetic storms) in the corona and yes, also associated with photospheric sunspots.  Sunspots have nothing to do with x-rays escaping from the interior of the sun!\n\nBecause these magnetic events are very ephemeral (things build up and then POW, you get a huge burst) the x-ray output is very variable.
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The sun does go through an eleven year cycle where sunspots and electromagnetic storm activity peaks every 11 years or so.  I don't know if it's getting stronger every time, though.  It does affect mankind more every cycle, but thats because we have more and more satellites in orbit all the time, so there's more hardware to be affected.  It won't cause too much trouble on the ground, though.  The Van Allen radiation belts and the ozone layers block most of it.  Mostly it would affect communications, and cause radio static, etc.  I wouldn't get your knickers in a knot over it.
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We've usually got about 36 hours warning of solar flare problems.   The light only takes about 8 minutes to reach us, but the charged particles that disrupt the ionosphere take around 36 hours, and both are produced simultaneously.   It's short wave radio that is affected.   For long distance communication around the curve of the Earth you use short waves in the frequency range 3 to 30 MHz. These are bounced around the world between the ground and layers of charged particles in the ionosphere about 100 km up.   The solar storm particles damage this reflective layer temporarily, sothe short waves shoot out into space.
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(m)\n\nThe electric and magnetic field associated with most electrical appliances and power lines are at the extremely low frequency end of the electric and magnetic spectrum. They have a frequency of 60 cycles per second, or 60 hertz (60 Hz), because the alternating electrical current that creates them changes direction 60 times per second. Radio and television broadcast waves are farther up the electric and magnetic spectrum. Visible light, which is at an even higher frequency yet, is the most familiar form of electric and magnetic energy.
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sunspots are associated with solar wind, which is streams of energy being projected outward from the sun's surface. When these energy particles reach the earth they interact with the earth's magnetic field, creating static, and disrupt the normal layering of the atmosphere that radio waves bounce back from. Northern lights are another effect of solar wind hitting the earth.
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here you go:\n\nhttp://images.google.com/images?svnum=10&hl=en&q=electromagnetic+spectrum&spell=1\n\nit contains all frequencies
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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
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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.
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normally they work with antennas, electromagnetic fields propagation and communications systems. It has to do a lot with electrical signals and electrical behavior of components in the high frequency spectrum (normally above 9MHz, but radio signals of a few KHz might also be of interest)
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Some properties of the electromagnetic spectrum is that all waves in this spectrum travel at the speed of light.  The spectrum varies by wavelength and also energy, from gamma rays -> xrays ->ultraviolet ->visible light -> infared ->microwave ->radio.  with gamma having the highest energy with the smallest wavelength and radio having the lowest energy with the largest wavelength.  \n\nHope this helps