Sound and light

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D. Appleton, 1881 - Physics
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Page 911 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Page 910 - SP, will have a constant ratio; or the sines of the angles of incidence and refraction are in a constant ratio. It is often referred to as the law of sines. The angle by which a ray is turned out of its original course in undergoing refraction is called its deviation. It is zero if the incident ray is normal, and always increases with the angle of incidence.
Page 959 - A B' to infinite distance, F will be the principal focus of both lenses, and the magnification is the ratio of the focal length of the object-glass to that of the eye-piece.
Page 917 - As the paper, for convenience of drawing, must be at a distance of about a foot, a concave lens, with a focal length of something less than a foot, is placed close in front of the prism in drawing distant objects. By raising or lowering the prism in its stand (Flo.
Page 790 - ... 10 minutes the liquid should have acquired a violet-brown colour. If much free gelatin is present the colour makes its appearance more slowly, and assumes a pure brown shade, without any violet. Pure gelatin does not produce any colouration until after the lapse of a few hours.
Page 892 - It thus appears, that, when a plane mirror is rotated in the plane of incidence, the direction of the reflected ray is changed by double the angle through ivhich the mirror is turned.

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