Category: Science - Physics
A visit to the seaside—What is a wave?—Wave-motion on water—Definition of a wave—Sea waves—Various forms of wave-motion—Wave length, velocity, and frequency—Atlantic waves—Rules for speed of sea waves—Illustrations of wave-motion—A stone falling on water—Production of a wave-t...
A visit to the seaside—What is a wave?—Wave-motion on water—Definition of a wave—Sea waves—Various forms of wave-motion—Wave length, velocity, and frequency—Atlantic waves—Rules...
2. CHAPTER II.Ship-waves—The viscosity of liquids—How it is demonstrated—Rotational and irrotational motion in fluids—Eddies and whirls—Smoke rings—Vortex motion—Professor Hele-Shaw’s experim...
3. CHAPTER III.Air necessary for the production of sound—A sounding body is in vibration—Harmonic motion—The difference between noise and music—The nature of an air wave—The physical qualities...
4. CHAPTER IV.The difference between sounds and musical tones—The natural period of vibration of an elastic body—The effect of accumulated impulses—Free and forced vibrations—Breaking down a...
5. CHAPTER V.The conception of an æther—The phenomena of light require the assumption of an æther—The velocity of light—Interference of light—Two rays of light can produce darkness—An electr...
6. CHAPTER VI.The experiments of Heinrich Hertz—Electric radiation—Lecture apparatus for producing and detecting electric radiation—Electric transparency and opacity—Why this difference—The r...
7. CHAPTER I.We have all stood many times by the seashore, watching the _waves_, crested with white foam, roll in and break upon the rocks or beach. Every one has more than once cast a stone...
8. CHAPTER II.It is impossible for the most careless spectator to look at a steam-vessel making her way along a lake, a boy’s boat skimming across a pond, or even a duck paddling on a stream,...
9. CHAPTER III.Leaving the consideration of waves and ripples on a water-surface, we pass on to discuss the subject of waves and ripples in the air. Nearly every one is aware, in a general way...
10. CHAPTER IV.Our discussion of waves and ripples in the air would be very incomplete if we left it without any further reference to the difference between those motions in the air which cons...
11. CHAPTER V.In the previous chapters your attention has been directed to the subject of waves on water and waves in air, and we shall now proceed to discuss some of the more difficult matte...
12. letter L, forming, therefore, a very narrow box with silver sides.The two silver plates are connected to the two long rods. As already explained, the metallic filings or finely powdered metal are not in their ordinary condition an electric con...
13. CHAPTER VI.Having in the last chapter explained the nature and mode of production of electric oscillations, and shown that when these take place in an open electric circuit or long straigh...