An Elementary Text book of Physics volume 2
An Elementary Text book of Physics volume 2
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In our eReader you can find the full English version of the book. Read An Elementary Text book of Physics volume 2 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 An Elementary Text book of Physics volume 2
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Measure the distances of the conjugate foci from the lens and calculate the focal length of the lens by the usual formula for a lens.
It is to be noticed in connection with the refraction of sound that the velocity of sound in most liquid and solid media is con- * See Chapter IV. In the Section on Light.
90 SOUND.
siderably greater than in air. It follows, therefore, that sound waves in air may be totally reflected at the surface of these media, and that the critical angle in most cases will be... small. Thus, in the case of air and water, the index of refraction as determined by the ratio of the velocities of sound in these two media is about *24, and the critical angle for the media is, there- fore, an angle of about 1 4. That is, for all angles of incidence greater than 14, sound waves are totally reflected at the surface of water. For most other liquid and solid media and air the critical angle is even smaller and it follows that, except in the case of nearly direct incidence, sound waves in air are totally reflected at the surface of any liquid or solid medium.
What to read after An Elementary Text book of Physics volume 2?
You can find similar books in the "Read Also" column, or choose other free books by R Wallace Robert Wallace Stewart to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Measure the distances of the conjugate foci from the lens and calculate the focal length of the lens by the usual formula for a lens.
It is to be noticed in connection with the refraction of sound that the velocity of sound in most liquid and solid media is con- * See Chapter IV. In the Section on Light.
90 SOUND.
siderably greater than in air. It follows, therefore, that sound waves in air may be totally reflected at the surface of these media, and that the critical angle in most cases will be... small. Thus, in the case of air and water, the index of refraction as determined by the ratio of the velocities of sound in these two media is about *24, and the critical angle for the media is, there- fore, an angle of about 1 4. That is, for all angles of incidence greater than 14, sound waves are totally reflected at the surface of water. For most other liquid and solid media and air the critical angle is even smaller and it follows that, except in the case of nearly direct incidence, sound waves in air are totally reflected at the surface of any liquid or solid medium.
What to read after An Elementary Text book of Physics volume 2?
You can find similar books in the "Read Also" column, or choose other free books by R Wallace Robert Wallace Stewart to read onlineMoreLess
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