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2nd. There is the direction of the electric vibration which is at right angles to the direction of propagation.
Now how can we picture these two motions at right angles to each other, and yet both at right angles to the line of propagation? First, let us take three straight lines and see how this may be done (Fig. 23).
Let A B, A S be two straight lines at right angles to each other, and A C
The explanation may, or may not,http://www.poloshirtsmw.com, be fully complete, but even if it be not perfectly correct, I am convinced that it will ultimately lead to a satisfactory physical explanation of this part of Maxwell's Theory of Light. In forming a conception as to the physical character of the vibrations in the electro-magnetic theory, we have to remember that there are three distinct vibrations, or motions, concerned in this theory.
round the sun. direction does it move? | | 4. Circularly round the sun | Both,Cheap Gucci Bags, as it circulates round or traversing space? | the sun while that body | traverses space. | 5. If circularly,Cheap Coach Bags, in what | The plane of the ecliptic. plane? |
3rd. There is the direction of the magnetic vibration or motion which is at right angles to both of the other two.
[Illustration: Fig: 22.]
We were unable, however,Cheap Ralph Lauren Shirts, at that time to give a definite physical conception of the aetherial vibrations, or of the relation of the various types of vibration to each other. Since, however, the development of the Aether from the electric and magnetic standpoint,http://www.coachoutletbag.info, which has led us up to the fact that the Aether possesses a circulating motion round the sun (Art. 91), the solution of the problem appears probable. I am of the opinion that the physical conception of the various vibrations to each other is now within the region of possibility,http://www.gucciwm.com, and in this article I wish to endeavour to give what seems to me to be a correct and philosophical explanation of this part of the electro-magnetic theory of light, the physical conception of which up to the present has not been generally understood.
Let us try to picture the actual fact by an illustration. Let S be the sun, with concentric spherical aetherial shells surrounding it (Fig. 22). Then S A and S C will be rays of light being radiated out from the sun, and the magnetic and electric vibrations have to be both at right angles to the line of propagation and in the wave front; the wave front being represented by the circular lines showing the section of the concentric shells running north and south.
1st. There is the direction of propagation.
We have also learned that the electric and the magnetic vibrations are in the wave front, so that these two vibrations, which are at right angles to each other,Discount Polo Shirts, are to be found on the surface, so to speak, of each aetherial spherical shell,http://www.louisvuittonmw.com, that surrounds the sun with ever-decreasing density,Gucci Handbags, and ever-decreasing elasticity.
Now we have seen that the direction of propagation of any aetherial light ray, is that of a straight line from the sun corresponding to the radius vector (Art. 76). We have also seen that the front of a light wave is really that of a spherical shell (Art. 71).
ART,Coach Factory. 95. Physical Explanation of the Vibration in the Electro-Magnetic Theory of Light.--In Art. 78 we learned that light was an electro-magnetic disturbance in the Aether which was propagated through the Aether,Cheap Ralph Lauren, with a finite velocity; and from this we gathered that light waves were nothing more or less than electro-magnetic waves, which were radiated from the sun, out into the Aether on every side.
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