Light: A Textbook for Students who Have Had One Year of Physics

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Missouri book Company, 1921 - Light - 295 pages
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Page 290 - This result followed also from the statement made in 0O that the electromotive force induced in any circuit is equal to the rate of cutting of lines of force by that circuit. For all of the lines which pass through the core cut all of the coils on s. If, therefore, there are twice as many coils in one case as in another, twice as many lines of force cut the circuit, and hence'the EMF is twice as great. If, then, we wish to develop...
Page 53 - ... that the ratio of the sines of the angles of incidence and refraction is constant for refraction in the same medium, was effected by Snell and Descartes.
Page 255 - The force that is mutually exerted between two charges varies directly as the product of the charges, and inversely as the square of the distance between them.
Page 82 - In words, the reciprocal of the focal length of a thin-lens combination is equal to the sum of the reciprocals of the focal lengths of the individual lenses.
Page 189 - D represent the difference between the number of heads and the number of tails when a coin is tossed n times.
Page 40 - ... Now suppose that instead of a single blow we strike a series of very rapid equal blows on the water. We now see that a disturbance starts out after each blow, but the speed of the disturbances after they leave the paddle is the same as before. The length of the individual waves in the system, that is, the distance from crest to crest or from trough to trough, will then depend on the rate at which we strike the surface with the paddle. If the wave front moves out ten feet in one second, and we...
Page 220 - Brewster4, with a happy sagacity, discovered the formula to be simply this, that the index of refraction is the tangent of the angle of polarization.
Page 245 - Right-handed screw. to the direction of the current as the direction of rotation of a right-- handed corkscrew bears to the direction in which it advances.
Page 104 - ... the ratio of the angle which the image subtends at the eye to the angle which the object subtends when viewed directly in its actual position.
Page 228 - ... an angle of 45 with the plane of polarization of the incident light and with the principal section of the calcite.

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