what is stark effect?
86731
The splitting and shift of a spectral line into several components in the presence of an electric field.
509278
As mentioned above, two hydrogen atoms are brought together under high temperature and pressure so that they "fuse" into one and create a Helium atom.  What is not mentioned is that the result of this fusing is the creation of a huge amount of energy.  The energy comes from the difference in mass between the two hydrogen atoms and the resulting helium atom which weighs less.  The mass dissappears and is converted into energy in the form of electromagnetic radiation and kenetic energy of various particals.
895113
This is true in isolated atoms.\n\nIf we put them into the electric fields generated by nearby atoms, especially those of water of crystallisation, the energy levels can change and rearrange the electron orbitals.\n\nTo explain this to our satisfaction would mean solving the equations and getting the answers.  Unfortunately this is known as a many bodied problem and only the simplest of them can be solved.\n\nTake heart in the fact that the energy levels are so close together that we can glibly announce the fact and move on quickly to the next topic!
1053116
The formula is statistical quantum electrodynamics.  I don't wan to do the math bit.  So think of it like this.  All solids (like your pencil or pole) are collections of molecules held together by various types of bonds (molecular, covalent, ionic, metallic).  It is easy to visualize your pole as a crystalline structure of molecules.  When you push on one end, the structure distributes the force by adjusting bond angles.  Same thing if you push on the pencil, by the way.  The impulse of your forcing will create a front that travels through the solid.  This front is roughly equivalent to acoustic wave s in the same media.  Now, what is interesting, if you had a slight electrical charge (vacuum is a good insulator, so the chance of you having a charge is pretty good) and pushed the pole, and the pole conducted electricity, a electrical signal would be sent off along the pole.  This would travel much faster, some large fraction of the speed of light.  But, resistance will prevent it from being detected at the other end.\n\nLook at the Nevada test sight declassified videos of underground nuclear tests.  You can see the propagation of the shock wave in rock.  As visualized, the time it would take for the person at the other star to feel your push would be (for steel):  3 lyr = 2.84e16 m,  divide by 5960 m/s = 4.76e12 s, divide by 3.15e7 s/yr  and you end up with 150,000 yr before your push is felt at the other end.
201797
The electrons jump to a higher level and then back to a lower level emitting a photon. This vibration (up one level, down one level) produces radiation below light frequencies also. If enough energy is added and enough electrons are jumping around the metalic bonding is broken and the iron melts.
1090476
Iron (like steel and certain alloys) contains atomic magnets or dipoles which can line up their 'magnetic axes' in a preferred direction.  In the magnetized state, all the magnetic axes will point in one specific direction, by which the iron filling will show polarity and hence be a magnet itself.\nWhen you heat the iron fillings, the high temperature makes the atoms to vibrate with increasing energy and this disturbs the dipoles and so the resultant magnetic axes point in their 'preferred' random directions, which keep changing due to the extra energy. If the iron fillings were magnetized before heating, all the magnetism would be lost. Magnetizing them after heating will not align the vigorously vibrating atomic magnets and rapidly changing magnetic axes.
773887
It relates to the Rayleigh-Jeans prediction and black body radiation that demonstrated the failure of classical physics. Just visit wikipedia for more info and how Planck's postulate solved the dilemma. http://en.wikipedia.org/wiki/UV_catastrophe
370272
Yes. Radiant energy strikes the matter surface it repel electrons from the matter and it release heat energy.
191960
See http://en.wikipedia.org/wiki/Hawthorne_effect
824668
Yes it sort-of works for a hydrogen atom.\nYou do need to know about electric field attraction.\n\nthe attraction of charges pulls the electron in, the angular motion holds it from being pulled all the way.\n\nAlthough this model (planetary model) is wrong, it is amazing how close it comes considering that it is so far from what we believe to be true!!
205616
The Begy atomic model. It eliminates the nedd for the quite unbelievable strong and weak nuclear forces. It also defines gravity as a force acting upon the universe rather than from within it. This reduces the forces in this universe to just one the electromagnetic force. Is this a unified field theory?\n\nWeb search, "Begy atomic model"
83355
Okay, you know the right hand rule. Good.\nFirst consider the effect of only the e-field: The e-field is pointing in the +x direction. Therefore, the force it exerts on the proton will also be in the +x direction.\nSecond, consider the effect of only the magnetic field: The magnetic field is pointing in the +y direction; therefore, the force it exerts on the proton will be in the -x direction (you use the rule you described to figure this part out). It so happens, that in the first scenario, the force exerted on the proton by the magnetic field exactly balances that exerted by the electric field. Therefore, the movement of the proton is unaffected.\n\nHowever, in the second case, the proton is accelerated through a potential difference of 2V. Therefore, it will be moving faster (think about it: a higher potential difference has greater "potential" to pull the proton.  Also, the equation F = qvB where q is the charge of the proton, v is its velocity, and B is the magnetic field strength, states that the faster the proton is moving, the greater will be the force exerted on it.  So, compared to the first case with only a 1V potential difference, the magnetic field here will exert a greater force on the proton. But, the force exerted by the electric field is unchanged. So, the net force on the proton will be in the -x direction.
748781
Whe elements are heated the electrons in the atoms in the element gain more energy thus move a level(energy level or electron rings) upper and away from the nucleus this is never for long as they loose their energy and go back a level back during this time(when the electron is moving back to its enrgy level thats the lower level) it emitts energy of different wavelengths in other words photohs of differenet wavelengths thus you see different coulors.
100600
A redshift is a shift in the frequency of a photon toward lower energy.
46196
I hope you don't take this to be something of a cop-out answer. Light is itself an electromagnetic field that is carrying energy through space -- commonly called an electromagnetic wave or 'light'. It is this wave that really makes things visible.\n\nConversely, if you have no electromagnetic wave or one of an invisible wavelength, (at least to the human eye) then it won't bounce off of the object or if it does it won't be visible when it reaches you.\n\nThe visible properties of an object are determined by how EM waves interact with the electrons near the surface of an object. These interactions are what make shiny things shiny (for instance).
423150
the effect is called Gradient!\n\nUse the help menu to figure it out, i dont have the menus memorized to talk you through it
399371
Basically, when you rub two certain materials, you will create static electricity, which is named that way because the charges do not _flow_, i.e. there is no current.\n\nNot so basically, but still very primitively, there exist two forms of material: ones that "likes" to "steal" electrons, and ones that "likes" to "give" electrons. Whenever these two are put next to each other, the electrons "jump" from one substance to the other, causing a potential difference, and possibly a spark (if the potential difference is high enough).\n\nRubbing two such materials does not cause this effect. It is a common misconception; when you rub two things you are simply increasing the surface area of contact between the two such substances, thereby creating a more noticeable effect.\n\nand the check spelling button screwed up some of my spelling. fix it yahoo! people, please. especially with the word 'effect' which was changed to 'effectt' and the plural of some words.