A Text book of Physics
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In our eReader you can find the full English version of the book. Read A Text book of Physics Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Text book of Physics
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These two methods of viewing the phenomena are essentially the same, for the rays are every- where at right angles to the corresponding wave-fronts ; but it is never- theless of use when employing the method of rays to have in our mind's eye the corresponding wave-fronts.
827. Curvature of a Surface.— If we have a disturbance produced at a point within an isotropic medium, the wave-fronts will be spheres with the point as centre. If, however, the medium is not isotropic, the form of the wave-fr...onts will in general be different. In the following pages we shall almost exclusively deal with spherical or plane wave- fronts. If we have a surface which is not a sphere, and at any point on this surface draw a sphere touching this surface, then for parts of the surface in the immediate neighbourhood of this point we may suppose the surface replaced by that of the sphere. In the same way we can draw a circle to touch any plane curve, and for points near the point of contact the circle will coincide with the curve.
What to read after A Text book of Physics?
You can find similar books in the "Read Also" column, or choose other free books by Watson William to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
These two methods of viewing the phenomena are essentially the same, for the rays are every- where at right angles to the corresponding wave-fronts ; but it is never- theless of use when employing the method of rays to have in our mind's eye the corresponding wave-fronts.
827. Curvature of a Surface.— If we have a disturbance produced at a point within an isotropic medium, the wave-fronts will be spheres with the point as centre. If, however, the medium is not isotropic, the form of the wave-fr...onts will in general be different. In the following pages we shall almost exclusively deal with spherical or plane wave- fronts. If we have a surface which is not a sphere, and at any point on this surface draw a sphere touching this surface, then for parts of the surface in the immediate neighbourhood of this point we may suppose the surface replaced by that of the sphere. In the same way we can draw a circle to touch any plane curve, and for points near the point of contact the circle will coincide with the curve.
What to read after A Text book of Physics?
You can find similar books in the "Read Also" column, or choose other free books by Watson William to read onlineMoreLess
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